10 Best LED Grow Light for 4×4 Tent- How Many LED Watts

(Last Updated On: September 9, 2022)

Are you looking for the best led grow light for 4×4 tent? or do you want to know how many led watts for 4×4 grow tent? Then you have come to the right place. Probably you have many questions already regarding LED light for 4×4 grow tents. So, let’s not waste time and straight go for what is there to know about LED grow lights.

We reviewed hundreds of LED grow lights available on the market and created a simple list to help you pick the best led grow light for 4×4 tent.

Each product was evaluated across a variety of factors: Safety, Durability, Watts, Optimal Spectrum, Actual Power Draw, Lifespan, and much more. These are truly the best options out there. Surprisingly, Our most recommended led grow lights are inexpensive.

How Many LED Watts For 4×4 Grow Tent?

How Many LED Watts For 4x4 Grow Tent
How Many LED Watts For 4×4 Grow Tent

How many led watts for 4×4 grow tent? How much wattage is too much, and how much isn’t? Where do I find the best led grow light ? Which specific LED brand is perfect for my 4×4 tent? And I’ve heard that PPF is important, what is it? how much light for a 4×4 grow tent is required? 

All these questions are based on grow lights. And they’re all confusing, because most indoor grower have variable answers. But worry no more. I will help you, answer every confusing question and provide a step-by-step guideline on how many watts for 4×4 grow tent is needed.

how many led watts for 4×4 grow tent? Generally, 1 square foot of grow space requires about 32w of actual wattage of power for flowering. For the vegetation stage, you’ll need around half the power (25w).

4 feet x 4 feet = 16 square feet

Flowering stage: 16 square feet x 32 watts = 512 watts actual power. ( Recommended: 512W-650W).

Vegetation stage: 16 square feet x 25 watts = 400 watts power. ( Recommended: 390W-450W power).

This means you need to get LEDs emitting an average of 512-650 wattage. However, it doesn’t mean this provides highest yields for your plants, hence the long answer.

There are many factors that come into play when considering LED grow light that offers the highest yield

  • What’s the distance between the light and the marijuana plants?
  • Which plant(s) are you dealing with?
  • You need to know about the PAR (photosynthetic active radiation)
  • Also, get to know about PPF, and the difference with PPFD
  • What about the lighting spectrum? What are the best coloring for the plants you’re growing? 
  • What’s the plant’s growth stage (seeding, veg, or flowering)
  • How many hours of exposure is needed?

10 Best Inexpensive LED Grow Light for 4×4 Tent

Each led grow lights was evaluated across a variety of factors: Safety, Durability, Watts, Optimal Spectrum, Actual Power Draw, Lifespan, and much more. These are truly the best options for 4×4 growing tent.

1. ViparSpectra 1200W LED Grow Lights – Best For Vegetative

best led grow light for 4x4 tent
Product Parameters  
Vegetative Coverage  4.5×4.5 ft at 32″ 
Flowering Coverage  3.5×3.5 ft at 24″
LED Bulbs (240pcs) High Intensity 5W Epiled/Bridgelux LEDs
Switches  VEG and BLOOM
Consuming 520W
Replaces 800W HPS/MH
Amperage 4.33A at 120V, 2.36A at 220V
Input AC100-240V, 50-60Hz
Lifespan ≥100,000 hours

Key Features

  • UL Certified LED grow Lights
  • Optimal full spectrum lighting
  • Ideal for All Growth Stage
  • VEG & BLOOM Double Channel
  • 30 days money back guarantee
  • 3 Year local warranty

One of the most popular led grow light, the ViparSpectra UL Certified 1200W is a the perfect LED grow Light for 4×4 tent as it covers maximum 4.5*4.5ft growing space. The full spectrum design has separate Veg and Bloom switch and providing light at all stages of plant development.

The 240 pieces of high-intensity 5W LEDs provide 90-degree pre-focused optics for precise spectral compositions and unrivaled performance. Apart from the electrical efficiency, it also guarantees longevity with 100,000 hours of a lifespan.

This ViparSpectra1200W can replace 800W MH/HPS grow lights while consuming only 520W. Thus it is energy saver as well as cost-effective. Additionally, it has 4 high-speed fans and aluminum heat sinks to expel the generating heat. These provide instant cooling in the case of overheating and give you better control over the temperature zones. And being UL certified ensures the model has undergone testing and safety standards to guarantee safe operation.

Using Instruction

Acclimation Period: 44-48 inches above canopy, lighting 10 hours a day, Veg on/ Bloom Off.

Young Vegetative: 40-44 inches above canopy, lighting 12 hours a day, Veg on/ Bloom Off.

Vegetative Stage: 32-40 inches above canopy, lighting 18 hours a day, Veg and Bloom Both on.

Flowering Stage: 24-28 inches above canopy, lighting for 12 hours a day, Veg and Bloom Both on.

Note: You should observe your plants regularly, adjust the height and using hour to meet your plant’s need.


  • Easy Control and Installation
  • Durable Fire-Resistant Iron Housing
  • Reasonably Priced Comparing the Light Output
  • Advanced Cooling System For Heat Dissipation
  • Balanced Spectrum with IR, Red, And Blue LEDs


  • The lights performed pretty well in veg but needed just a bit more for flower

2. MARS HYDRO 2000W LED Grow Light

MARS HYDRO 2000W LED grow light
Product parameters  
Veg stage  4x4ft
 Bloom stage 3.5×3.5ft
FULL SPECTRUM   3000K 5000K and IR 660nm 760nm RED
PAR/LUMEN 1122umol@18
Consuming 300W
Max yield 2.0g/w

Key Features

  • Ideal for All Growth Stage
  • Daisy chain function up to 15 light
  • NEWEST SMD LED technology
  • Low Running Costs

The Mars Hydro TSW 2000W is another Most used and best LED light available on the market.

The quantum board design offers a white light spectrum that provides the highest PAR/LUMEN output. Compared to the old individual red or blue light, this newest technology offers 30% higher yields.

With the dimmer, you can adjust the brightness and intensity yourself to maximize growth. The intensity can increase by up to 20%. Moreover, 684 LEDs consume only 300W of power this saving up to 50% energy than other light.

The noise-free fanless design makes it suitable for indoor gardening. But no need to worry about overheating as the large aluminum boards can dissipate heat efficiently. Also, the easy setup is perfect for either beginners or experienced indoor growers.


  • Auto-Sensing Power Supply
  • Amazing Control Set Up for Wattage Adjustment
  • Two Waterproof and Dimmable Mean Well Drivers
  • High Reflective and Noise Free Design
  • Suitable for Large Rooms and Commercial Setups


  • Lesser Heat Management

3. MARS HYDRO TS 3000W LED Grow Lights

Product parameters  
Veg stage 5′ x 5′
Bloom stage  4′ x 4′
 Max yield 2.0g/watt
FULL SPECTRUM   3000K 5000K and IR 660nm 760nm RED
PAR/LUMEN output 1274umol
True output 450 watts
LEDs 1016
Amp 3.782A@AC120V;2..18A@AC230V;1.619A@AC277V

Key Features

  • Ideal for Commercial Setups
  • Easy dimming & daisy chain
  • 2 waterproof Mean Well Drivers
  • Noise Free Fanless Board Design
  • Wideband Full-spectrum Light

Compared to the other models in this range, the Mars Hydro Light offers the most features at the lowest price.

The modern quantum board design uses Epistar LEDs to increase the light intensity of up to 20%. Not only that, but the evenly coverage also allows the plants to receive more energy without burning them.

The full spectrum grow light with the newest SMD LED technology provides the highest PAR/LUMEN output. Compared to older light, you can get a 30% higher yield with TS 3000W. It is also more scientific and energy-efficient, as it draws only 450W of power with 1016 LEDs.

It is a Perfect 4×4 LED Grow Light For Bloom stage and ideal for commercial use as well because of its high quality, full-spectrum light quality, and easy operation ( easy dimming & daisy chain function, up to 15 multi-lights connected).


  • Over 90% Light Energy Absorption
  • Uniform and Wide-Beam Light Distribution
  • Reflective Aluminum Hood to Improve the Light Efficiency
  • Easy and Quiet Plant Growth
  • Low Power Consumption and High Energy Efficiency


Power Switch Not Available

4. ViparSpectra PAR1200 Led Grow Lights

ViparSpectra Led Grow Light
Product parameters  
Vegetative Coverage 4x4ft at 40″
Flowering Coverage 3.5×3.5ft at 36″
LED Bulbs 240pcs High Intensity 5W Epiled/Bridgelux LEDs
Actual Power Draw 545W±3% at 110V
Input AC100-240V, 50-60Hz
Replaces 800W HPS/MH
Amperage 4.95A at 110V, 2.47A at 220V
Lifespan ≥100,000 hours

Key Features

  • Optimal full spectrum grow Light
  • Solid Construction & Efficient Cooling System
  • Big aluminum cooling heat sinks
  • 30 days return guarantee
  • 3 years warranty

Another most used led grow light from ViparSpectra, the PAR1200 is specially designed to produce high PAR output and coverage.

The optimal full spectrum comes with two separate light dimmers. The Veg and Bloom dimmers individually control the red, white and blue light channels. You can use a timer to control them according to indoor plants growth stages and requirements. Also, the IR LEDs are effective in the promotion of cell division, germination, leaf building, and flowering.

The secondary optical lens magnifies PAR and increases canopy penetration by up to 200%. Moreover, this product only consumes a maximum of 545W of power, compared to the traditional 800W Grow light. The lifespan extended up to 100,000 hours.

Not only energy-efficient but it has also a better heat management system. The Upgraded 3.2″ front-fans with big aluminum cooling heat sinks make it run 70% cooler than HID lights.


  • No Loud Sounds
  • Daisy Chain Design
  • Durable Build Quality
  • Support Plant Germination
  • Dimmable Veg and Bloom Settings


  • Few people claim for Insufficient Light Intensity

5. Phlizon 3000W LED Grow Lights

Phlizon 3000W COB LED Light
Product parameters  
Core Coverage area 48″*48″(4*4 ft)
Maximum coverage area 50″*50″(4.2*4.2 ft)
FULL SPECTRUM 110pcs 630-660nm, 12pcs 470nm, 12pcs 6500k, 4pcs UV, 6pcs IR
PPFD 2522.8 umol/m²s

Key Features

  • Cree cob led lights
  • Extremely High PPFD (2522.8 umol/m²s)
  • Full spectrum lamp integrated bead
  • Smaller thermal resistance
  • Less light attenuation

Phlizon CREE COB 3000W led light is also very popular for its high quality and efficient features. Besides, the COB or Chip On Board circuits LEDs are more efficient and much brighter than traditional LEDs.

The Phlizon offers higher brightness and smaller thermal resistance. The full spectrum led grow light has blue, red LEDs with a few IR, UV, and white LEDs as well. Using Veg and Bloom buttons, you can easily switch between light profiles at different growth stages.

As the LEDs have less light attenuation and longer life, it suffers less from burnout. Also, the UV protection, fire-proof PC Cover and metal frame ensure more durability, safety, and long-lasting performance.

Due to its maximum energy-saving effects, the actual power consumption is only 600W. Moreover, it is more energy-efficient than HPS, HID, and MH lights. Maximum Phlizon CREE COB 3000W led light can cover 4×4 grow tent.


Lightweight and Fire Resistant Build
Monitor for Both Temperature and Humidity
Adjustable Rope for Light Elevation
Longer Lifespan of ≥ 50,000 Hours
High PPFD Value for Faster and Better Plant Growth


  • Poor Ventilation

6. HLG Quantum Board LED Grow Lights

HLG Quantum Board 4x4 LED Grow Light

Key Features

  • Quantum boards with Samsung LM301H
  • Wattage output from 200 to 500 watts
  • Reliable Passive Cooled Design.
  • high efficiency lumens per watt
  • Full-spectrum White and 660nm Red
  • 3-Year Warranty

If you are thinking about going all out and spare no expense for your 4×4 grow tent, then go for the HLG 550 V2 high power led lights. Its price may fall on the higher range, but you’ll get the best grow led lights with unrivaled quality and features from this model.

The HLG 550 V2 has 4 custom-designed high-efficiency white light quantum boards with Samsung LM301B and Deep Red LED. The perfect full spectrum grow lamp has 3500K white light plus 660 nm deep red LEDs for enhanced flowering. The V2 model draws fewer watts of power and exudes more light.

With a 4.5*4.5ft core coverage area, the light evenly spreads all over the grow space. Using the Meanwell driver, you can decrease the intensity by 50%. Not just output, the actual power consumption also gets halved while in the dimmable state. It draws 480W of actual power and 240W when dimmable, which is equivalent to a 1000W HID system.

So in actuality, it costs far less to operate and generate far less heat too.


  • Fast and Rapid Growth for indoor Plants
  • Quality Design Ensuring Low Temperature
  • Suitable for Both Vegetation and Harvest Growth
  • Usage of More Green and Yellow Light
  • Upgraded INVENTRONICS Power Supply


  • Very Expensive

7. Spider Farmer SF4000 LED Grow Light

Spider Farmer SF4000 LED Grow Light
Product parameters  
Veg coverage 6 x 6 ft
Flower coverage 5 x 5 ft
Max Yield 2.5g/watt
Full Spectrum 3000K, 5000K, 660nm and IR 760nm
Input Voltage AC100-277V
Lifespan ≥100000 hours
Amp 3.787A@AC120V,
Lumen 79296Lm±5%@AC120V,

Key Features

  • Samsung LM301B Diodes
  • High Quality Yields
  • Low Running Costs
  • Customized Dimming Design
  • Well Made Construction
  • 3 years of after-service

Want the power of Samsung LM301B diodes, but can’t invest that much money? Don’t worry, there are better alternatives out there, you can consider Spider Farmer SF-4000 led grow lights for you grow tents.

The Spider Farmer SF-4000 has a quantum board design that comes with Samsung LM301B LEDs. The full spectrum grow light including blue, white, red and IR lights provides 50% higher yields with less energy, compared with other red/blue lights.

One of the best features is its uniform light coverage. The large quantum board has evenly placed diodes for better light distribution. It is a very suitable light for 4×4 grow tent and can cover 4 to 6 cannabis plants effectively.

Compared to traditional light, quantum board LED light have a higher level of energy efficiency. Consuming only 456W of power, the SF-4000 also comes with better micromoles/joule as compared to the grow lights in the market.

Waterproof and electric shock proof covers on wires ensure higher safety. The cooling system management and durable build guarantee a 50% longer lifespan compared with other brand lights.


  • Heavier Yields on High-Quality Crops
  • Unique Fan Less Design
  • Meanwell Driver for Dimming Function
  • Durability Test to Ensure Perfect Operation
  • No Assembly Required


  • No Fans So Light Can Get Too Hot

8. YINTATECH 1500W – Inexpensive LED Grow Light

YINTATECH 1500W Inexpensive LED Grow Light
Product parameters  
Core area 4.5×4.5ft
 Maximum area 5.9×5.9ft
LED Quantities 150pc 10W Double Chips LEDs
Max Power 1500W
Energy Consumption 150W±5%
Angle of LEDs 140°
Input Voltage AC100~240V
Working Frequency 50-60Hz
Lifespan ≥50000 hours

Key Features

  • No Reflector to ensure safety
  • Isolated power supply
  • Built-in 3 high-speed silent cooling fans
  • 3.0mm thickened aluminum base plate
  • Comes with a hygrometer thermometer

YINTATECH 1500W led light is considered the best inexpensive led grow light for 4×4 tent available in the market now. If you have a budget problem, but at the same time you want a best led light, this cheap led grow light is for perfect for you.

However, the Yintatech 1500W has a wider application. As it can be used for both water-soluble culture and soil culture.

It has a full light spectrum design producing PAR of 380-800nm with universal Blue Red IR UV and white light. The IR and UV LEDs promote the plant’s defense mechanism and the blue and red LEDs help plant growth. The dual switch and daisy chain design enhance performance and higher yields.

With 150pcs 10W double-chip LEDs with actual wattage range 150W, It provides a bright light and core coverage area of 4.5*4.5ft. Along with the extended lifespan up to 50,000 hours, it can save 80% of the electricity bill compared to the HIS lamps.

It has some great safety measures in place. 3 built-in high-speed quite cooling fans, metal cooling heat sinks, and aluminum plate work well for better heat dissipation. They also protect the light from high temperatures and being noisy.


  • Built-In Isolated Power Supply
  • Adjustable Rope Hanger
  • Suitable for All Stages of indoor Plant
  • Extremely Reasonable Price
  • Energy and Heat Efficiency


  • Not Many Extra Features Included

9. BESTVA 1000W Full Spectrum LED Light

BESTVA 1000W Full Spectrum LED Grow Light

Key Features

  • Dual-chip(10W) LEDs
  • VEG & BLOOM Switches
  • 3mm thickness aluminum plate radiator
  • Powerful Cooling System
  • 90 days return guarantee
  • 3 years warranty

We all know that BESTVA full spectrum LED Grow Lights most popular for indoor gardening and It is consider another best led grow lights for grow tent.

Features of dual chips (10w) LEDs provide much brighter and efficient light than traditional 3w and 5w leds with highest PAR/LUMEN out per watt. It has nine Nine different bands of LEDs which provide full light spectrum, just like in the natural sunshine.

You can grow any type of plants, vegetables and flower at all growth phase of plant in your 4×4 grow tent. There are two switches, VEG and BLOOM. The VEG is ideal for growing and Bloom is perfect for seedling / flowering. But if your plants need more energy, you can turn on both switches.

Most of indoor grower worries about heat. But this light will minimize your worries because they use a 3mm thickness aluminum plate radiator which helps better heat dissipation.

Most important, Holes on the aluminum plate and the glass make heat convection. As a result, the LEDs able to run 50 to 60℉ lower than any other competitive LEDs.

If you place the light at 24 inches above the canopy, it will only consume 185 watts, No Needed daisy chain. They are confidence about the quality of products and provide 90 days satisfaction or money back guarantee and 3 years warranty.

Using Instruction:

Germination Stage: 26″ -30″ above the plants and lighting for 15-18 hours a day.

Growing Stage: 20″-26″ above the plants and lighting for 15-18 hours a day.

Flowering Stage: 18″ -24″ above the plants, recommended lighting for 12-14 hours a day.


  • Highest Par/Lumen Output Per Watt
  • No Extra Ballast Needed
  • Useful Dimmer Switch Feature
  • Approximately 100,000 Hours of Lifetime


  • Not Waterproof

10. King Plus 1500W LED Grow Light

King Plus 1500W LED Grow Light
Product parameters  
Vegetative coverage 6’x6’
Flowering coverage 5.5’x5.5’
 Electricity Consumption 375W
LEDs 100pcs Dual-Chip 10W
Input Voltage AC85-265V
Item Weight 16.2 pounds
Avg. Power Draw 615W
Working Temp -68~104℉
Lifespan 100,000 hours

Key Features

  • Veg and Bloom switches
  • Energy-saving technology
  • Multiple high-speed mute fans
  • Upgraded aluminum radiators
  • Advanced cooling system
  • free return for 90 days
  • 3 years Professional Service

High end, high yield – whatever the distinction, another best led light for 4×4 grow tent -the King Plus1500W is here to provide you with maximum output at a cheap price.

Including UV+IR, the full spectrum light ranges from 380 to 780 nm which is equal to natural sunlight. It provides two different veg and flowering growth switches. The Veg switch uses blue and white LEDs for seeding and the Bloom switch uses red and white LEDs for flowering.

The effective cooling system helps the safety measures a lot. The multiple heat sinks, high-speed mute fans, upgraded aluminum radiators enable the light bulb to work at a lower temperature. So there’s less chance of plants burning down and more chance for healthy growth.

The 300 high tech double-chip 10W LEDs provide brighter light than any traditional 2000W HPS grow light. However, the great light output only consumes 615W of actual power, saving you a lot of electric bill and money as well. Along with longer-lasting and durable build, It has an expected lifespan of 100,000 hours.

Using Instruction of King Plus 1500W LED Grow Light

Germination Stage: 32″ -45″ above the plants, lighting for 14-18 hours a day.

Growing Stage: 30″-42″ above the plants, lighting for 12-14 hours a day.

Flowering Stage: 28″ -38″ above the plants, lighting for 9-12 hours a day.

Fruiting stage: 28″ -38″ above the plants, lighting for 7-8 hours a day.


  • Large Coverage Area
  • Adjustable Height and Lighting Region
  • Efficient Electricity Use
  • Quiet Operation
  • Effective Heat Dissipation


  • None

Where Do I Get the Best Grow Lights for 4×4 Tent?

Well, there are lots of best LED grow lights brands on the market, and each comes with its unique features. Most of them are energy efficient, for better effectiveness on plant growth. You can also get them for a better price.

As expected, there are a number of factors to consider on how to choose the best led grow lights for 4×4 grow tent. The most important factor is the LED’s capability to change its wattage as per hours exposed to the marijuana plant.

Although most LEDs have constant power or heat energy release, some have controls where you can control how much wattage you want released, in terms of hours, which depends on the growth stage.

That is, since seeding, vegetation and flowering stages require different wattage (and PPFD), it’s best to go with panels that come with installed with controls for different power release. If you do not get enough light from single light, you can consider for using multiple lights for better result. But using multiple lights can increase electric cost. Its price is affordable. Opt for one that’s energy efficient.

Also, the LED panel should also have height changeability where you can either increase or decrease its height from the plants’ canopies.

How to Choose the Right LED Light for 4×4 Grow Tent

All the led grow lights doesn’t necessarily mean the best for YOU! For it to be that, you need to compare your requirements with the features the model offers.

Now that you have seen the models, consider these factors before making your purchase. That way, you won’t buy something only later to regret it. We always suggest for not going to cheap grow light for your grow tent.


An light bulbs with a different wavelength ensures maximum growth. Plant from stage to the stage requires different light spectrum –a full spectrum includes red, white and blue light, also infrared and ultraviolet lights.

Also, full-spectrum lights come with adjustable settings with VEG and Bloom switch, providing flexibility in the growth process. Nowadays most high-end models are engineered to work exceptionally well in flowering as well as vegetative plant growth cycles.

Light Intensity

Having too much light or having not enough light – both can be harmful to the growth of your plants. You need to have the right amount of light intensity for the plants to be healthy. To get a balanced intensity, you need to consider the plant’s growth stage and the size of your grow space.

The most ideal intensity (lumens) ranges from 300 to 800 lumens for every square foot. If you not get sufficient light intensity from your single light for every square foot, you can use multiple led grow lights.


PAR refers to ‘Photosynthetically Active Radiation.’ It is the range for all the different wavelengths/colors of light that plants use for photosynthesis. Your light should have all the different wavelengths/colors but especially important are the blue wavelengths for vegetative growth and the orange/red wavelengths for the flowering process. You should Look for High lumen and High PAR Value Features before buying any light.

The plants under the middle of the light receive the full PAR value while those at the edges may get less light. A high PAR is not necessarily better. Actually, high quality light have lower PAR values because the power is distributed evenly rather than concentrating in the middle.

Energy Efficiency

The LED grow lights operate 8+ hours per day and it takes a huge toll on your electricity bills. In that case, look for an energy-saving light providing optimum performance. Your light should use less power but offer mimic of natural light and full coverage. But also you have to ensure sufficient light.

Moreover, it must be able to operate for at least 10 to 12 hours each day. Before buying, search up the wattage of that model to find out how much power the light will consume.

Easy setup and Maintenance

Usually, cheap items burn out faster and need to be installed frequently. That way maintenance costs also keep piling up. High-quality led lighting system may be more expensive but they’ll save you from any extra cost.

Also, look for lights that are easier to install so that you don’t have to call professionals and pay extra charges. If you know grow light setup and care for your light fixture, it’ll save you tons of time, money and energy while growing your plants.

Material Quality

The ideal grow light for 4×4 tent should be durable, environment-friendly, and made up of good quality material. Consider the product information provided on the instruction manuals or boxes of the lights.

Also, check if the products have undergone safety tests and whether they abide by the highest industry standards or not. You’ll know a high-quality product from its reputation and performance giving you the best value for money.

How to Set up LED Grow Light in a 4×4 Grow Tent

Before setting up your LED grow lights in your 4×4 grow tent, there are few things you need to consider

  • Look out for the light uniformity of your LED grow lights
  • Plan the height at which the grow lights will be hanged
  • Ensure the efficiency of grow light installation

Steps to setting up an LED grow light in a 4×4 grow tent

  1. Preparing the grow lights: Assemble the grow light and everything that comes with the package, including screws or clips and a metal wire hanger.
  • Prepare the metal wire hanger: Although a metal wire hanger is not exclusively included with the grow light, you can buy one separately and hang it from the rope ratchet of the grow tent’s ceiling. If the wire is too long for your grow light, consider shortening it by analyzing the frame of the grow tent.
  • Connect the grow lights: Connect the LED light to the two arms or loops from the two ratchets of the metal hanger. Secure the ratchet at the very bottom of the tent.
  • Secure the light: Take two arms of the wire and screw the cap above the loop. The cap with a hook or ratchet makes it easy to hang the lamp. One can also use a rod above to hang the light.
  • Plugin: Plug the LED lights into the power strip. After setting up with the power plug, make sure to turn on the timer in the outlet.
  • Maintain a safe distance: When setting up the grow light, make sure you’re determining a safe height to hang your grow light as this will primarily affect the growth of the plant both during the vegetation and flowering period. As the plants grow, the adjustment of the height changes accordingly.

a) Distance during vegetation stage: Grow lights in this stage need to be much closer to the plants to maintain a very strict photosynthesis process. Hence the distance that should be maintained between the LED grow lights and the plants are about 12 to 24 inches apart.

b) Distance during flowering stage: Plants attain maximum growth during the flowering stage and won’t need LED lights to be as close as they did during the vegetation stage. The typical distance between the plants and lights at this stage should be 16 to 36 inches. However, moving the lights closer to a distance of 12 to 14 inches would maximize the photosynthesis process.

Things to note:

  • Before setting up LED grow lights into your 4×4 grow tent, make sure to build a wire shelving unit to support the grow light setup
  • Choose the LED lights that will be just the same in width, complying with the shelving unit.
  • Get proper information about the PPFD needs of your plants from the manufacturer and hang the light at the correct height accordingly.
  • Make sure the lights are uniformly distributed around your grow tent to ensure more consistent and high grow yields.

Grow light setup can come off as tricky to many. However, with the right tools and the right ways of analyzing the grow space, it becomes simple to set up LED grow lights as needed. Your LED grow lights would stay in a stable position if the setup is sturdy and adjustable.

What’s PPFD? How Is It Measured? And How Much is Needed for Best Yield?

The PPFD is the amount of photons being absorbed by the plants, that’s necessary for photosynthesis. And it’s influenced by area coverage of the growing area (in square feet).

While PAR (photosynthetic active radiation) is the amount of radiation reaching the plants for usage in photosynthesis, the PPFD is the exact amount of photons absorbed by the plants as per the area coverage of the grow tent.

Therefore, the PPFD is the most important aspect to take measurements of. This is the total amount of photons usable by your plants, which depends on the growth stage – seeding, vegetation, and flowering.

For healthy plant growth cycles, and best yields, the following guide is advisable:

a) Seeding – 200 to 400 PPFD

b) Vegetative plant growth – 400 to 600 PPFD

c) Flowering (or budding stage) – 600 to 900 PPFD

Note that the PPFD is influenced by the distance from the plants. The closer the light, the better. You can always measure the effectiveness of the distance using a PAR meter. This is available on Amazon at great price.

Any figure that’s more than 1200 PPFD is bad for the plants. You don’t wanna make your plants wither due to too much light. This forces plant to use their energy in getting rid of excess light rather use the same energy for growth. It leaves it stunted.

Does Interior Reflections (Mylar etc.) Affect the PPFD Intake?

Of course, yes. With the right reflector materials, your cannabis plants will experience the best yields. Similarly, if your grow tent’s interiors absorb too much of the light, then you’ll need to increase the wattage, to cater for the lost heat energy.

Most importantly though, it’s advisable to focus on light spectrum intake, and the required spectrum from the LEDs to the plant’s canopies.

That is, don’t be bothered by the amount of light released into the entire grow tent, because some of it get lost in the grow tent’s walls. Focus on the canopies, and how much PPFD light spectrum is absorbed by the plant.

When using the PAR meter, make sure to place it somewhere near the plant’s canopies. This gives you the accurate measurement of how much photosynthetic light reaches the plant.


Indoor gardening got a lot easier with these best LED lights. There are less fire hazard and more light for your plants now. No wonder the popularity of grow lights keeps increasing!

So, here is all the information on the best led grow light for 4×4 tent at your fingertip. The products above are all highly rated and reviewed by satisfied customers and offer high-quality features and performance. Also, make sure to read our buying guide to consider some useful factors. Maybe you can even pick up a bit of tip and tricks.

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