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Best Grow Lights by Watts: 1000w, 600w, 400w, 300w

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Looking for the best brand for grow lights of 1000w, 600w, 400w, 300w? If so, we’ve compared and reviewed all Top Best Grow Lights For Sale categorized in watts power.

You should do your research and know what you’re goals are, When it comes to purchasing an LED lighting unit.

Here is a quick Pre-purchase checklist:

  • Size of grow space (both footprint and height are factors to consider)
  • Budget (LEDs are more expensive than other lights, about 2~3 times more than a comparable HPS system)
  • Brand Reputation
  • Cooling requirements

For more details, Check over 13 things you should consider before choosing your grow light

What is wattage [watts]?

The watts or wattage is a measure of the amount of energy used by bulbs. It is the rate at which energy is generated or consumed and hence is measured in units (e.g. watts) that represent energy per unit time.

For example, when a light bulb with a power rating of 100W is turned on for one hour, the energy used is 100-watt-hours (W·h), 0.1-kilowatt hour, or 360 kJ. This same amount of energy would light a 40-watt bulb for 2.5 hours, or a 50-watt bulb for 2 hours.

LUMENS is the measure of brightness provided by a light bulb (the higher the lumens the brighter the bulb). With energy efficient bulbs being highly desired in the markets, the most crucial step in understanding the amount of light generated by such energy saving light bulbs like CFL and LED bulbs is to understand the Lumens.  This is especially important since as per FTC 2012 regulation, light bulb labels are required to emphasize a light bulbs Lumens as the standard of measure for bulb brightness instead of the Watts. Different models of grow light of the same wattage emit different lumen of light. in this guide, it will be easier for you to compare them on basis of lumen.

How many watts do I need?

A very common question!

You need to consider the coverage area [The area you need to cover for plants] and actual wattage [of the light you’re using]

Coverage Area by watts

First, let’s look at the footprint. Just about every manufacturer lists their “core coverage” numbers on their sites. Take most of those numbers with a grain of salt. Here are my recommendations:

Foot Print Light Size

  • For 2′ x 2‘, a single 150-250 watt unit should be adequate for this space
  • For 2′ x 3′, a single 300-400 watt unit
  • For 2′ x 4′,  two 150-250 watt units
  • For 4′ x 4′, four 150-250 watt units, a pair of 300-400 watt units or a single 600+ unit
  • For 4′ x 6′, three 300-400 watt units or a pair of 600+ units

Actual Wattage

First, you need to understand that all watts are not created equal (will actually a watt is a watt).

Watt isn’t equal is how manufacturers label their units.

You should look at the watts a unit actually uses and not the “watts on the board”.

Let’s take for example a unit that has 288 3watt LED chips on the board, 288×3=864 so I have an 864-watt unit right?

Nope! You have a unit that is capable of 864 watts if driven to its capacity.

When you drive a unit to its max you are going to produce a lot of heat and shorten the lifespan of the unit considerably.

So most manufacturers only drive their units to a fraction of that and balance the fine line of performance and reliability.

So that same unit that has a board wattage of 864 may be marketed as anything from a 360 to an 800 watt light.

The key here is to forget what the name is, look at the actual power draw of the unit.

We have compared the grow lights on their actual wattage below.

This guide has made a comparison between different LED models of the same wattage on basis of actual wattage and coverage area.

Growing Tips

LED grow lights are powerful and can get great yields when used correctly.

The distance needed between an LED and the top of the plants varies quite a bit from model to model and from manufacturer to manufacturer.

Many things can affect the optimal distance from plants, including the individual size of each LED bulb and the way the manufacturer used lenses to reflect light downwards at your plants!

LEDs should generally be kept at least 18″ from the tops of plants

Contact the Manufacturer If Possible – Ultimately when it comes to LED grow lights, the best thing to do is contact the manufacturer to see what they recommend as far as distance from the tops of plants.

Lighting Time:

Vegetative Stage: 12-14 hours on

Flowering Stage: 9-12 hours on

Fruiting Stage: 7- 8 hours on

Height above Plants:

During different stages of plants’ life cycle, they need the different amount of light. You can control the intensity by changing the height of LEDs above plants.

Seeding: 24 inches

Germination: 24 to 30 inches

Vegetative Stage: 18 to 24 inches

Flowering: 12 to 18 inches

Although LED grow lights run cool, the LEDs available today give off an intense amount of light which is great for yields, but can give your plants light burn if kept too close.

1000 Watt Grow Light

covers 4′ x 4′ (1.2m x 1.2m) area up to 5′ x 5′ (1.5m x 1.5m).

We’re comparing top 4 best 1000 watt led lights. All emit 380-780nm, have a voltage of 85v-265v, working frequency of 50~60Hz.

1000w LED Grow LightsActual WattageCoverage AreaHeightLifespanWarranty
King Plus 1000w LED Grow Lightn/a3.4' x 3.8'2' - 3.5'50,000 hrs3 yrs
Bestva 1000w LED Grow Light185 w4.7' x 5.1'2 ft100,000 hrs3 yrs
HollandStar 1000w LED Grow Light 180-200w4.0' x 4.0'3' - 4.6'50,000 hrs3 yrs
DXG 1000w LED Grow Light n/a3.5' x 4.0'4' - 5'50,000 hrsn/a

King Plus: Currently best seller of 1000 watts LED light with 550 customer reviews.

Bestva: is a clear winner in these top 4 best 1000 watt LED lights with LEDs Angle of 120°, better lifespan, timer-controlled.

HollandStar: Comparatively lesser price but don’t have much reviews/customers

DXG LED: They give free Eye Protection Glasses included in package which others don’t have

Prices on Amazon

600 Watt Grow Light

covers 3.5′ x 3.5′ (1m x 1m) area up to 4′ x 4′ (1.2m x 1.2m)

ViparSpectra 600w: 2nd most popular LED light with a LEDs Angle of 90°, upgraded 4.72” fans and big aluminum cooling heat sinks (0.8” height) and can be controlled by timers

BestVa 600w: with LEDs Angle of 120° [larger the better] and Dual-chip(10W) LEDs is a trusted LED brand. Lifespan 100,000 hrs

KingPlus 600w: Most popular 600w LED light with over 520 customers on Amazon. Have two cooling fans, Double Chips 10W(2pcs 5w chips in every led) and the thickened the led board(ours:3.0mm, others:1.6mm)

ColoFocus 600w: Have 2 cooling fans and Double Chips 10W(2pcs 5w chips in every led)

Check the following table for a quick comparison between best 600w LED grow lights. It is the comparison between actual power [led draws], core coverage area, height above plants [recommended by manufacturer], lifespan and warranty.

600w LED Grow LightsActual WattageCoverage AreaHeightLifespanWarranty
VIPARSPECTRA 600 LED Grow Light276w4' x 4'2'100,000 hrs3 yrs
Bestva 600w LED Grow Light125w4' x 3.6'2'100,000 hrs3 yrs
King Plus 600w LED Grow Light 120w3' x 3.4'2' - 3.5'50,000 hrs3 yrs
ColoFocus 600w LED Grow Light 110 - 120w3.5' x 4.0'3' - 5'50,000 hrsn/a

Prices on Amazon:

400 Watt Grow Light

covers 3′ x 3′ (0.9m x 0.9m) area up to 3.5′ x 3.5′ (1m x 1m)

Apollo 400w: Most popular 400w grow light has 80 LEDs with a mixed angle of 90 to 120 degree light for overlapping coverage to minimize shade or dark zones in the growing tent or enclosure.

Roleadro 400w: Drive the most [actual] wattage among the list

Marshydro MarsII 400w: Claims ETL certificated lights with VDE and UL Certified wires

Gianor 400w: With 3-years warranty, Gianor is most trusted brand for  400 watts led grow lights.

400 watts LED Grow LightsActual WattageCoverage AreaLifespanWarranty
Apollo 400w LED Grow Light198w± 5%3' x 3'50,000 hrs2 yrs
Roleadro 400w LED Grow Light200w±5%3' x 3'50,000 hrs2 yrs
Marshydro MarsII 400w LED Grow Light162w±5%3' x 3'100,000 hrs2 yrs
Gianor 400w LED Grow Light150W±5%3' x 2.5'50,000 hrs3 yrs

Prices on Amazon:

300 Watt LED Grow Light

covers 2′ x 2′ (0.6m x 0.6m) area up to 2.5′ x 2.5′ (0.8m x 0.8m)

MarsHydro Mars 300w: Have most customers. Have an average Lumen of 4300lu. Worst warranty (1 yr) but cheaper than others.

Roleadro 300w: Best Seller of 300w led grow light. Have 7000Lu of lumen and view angle of LEDs: 90°and 120°

VIPARSPECTRA 300w: Good price while looking at the lifespan and warranty it offers. LEDs Angle is 90°. Detailed viparspectra review here. A lot seem to consider them to be the most reliable right now. Runs cooler than the others.

Advanced Platinum 300w: Next generation led technology with a surprising warranty of 5 years! The USA-made product with a lifespan of 100,000 hrs. Have  90 Degree Secondary Focusing Lenses!

400 watts LED Grow LightsActual WattageCoverage AreaLifespanWarranty
Apollo 400w LED Grow Light198w± 5%3' x 3'50,000 hrs2 yrs
Roleadro 400w LED Grow Light200w±5%3' x 3'50,000 hrs2 yrs
Marshydro MarsII 400w LED Grow Light162w±5%3' x 3'100,000 hrs2 yrs
Gianor 400w LED Grow Light150W±5%3' x 2.5'50,000 hrs3 yrs

Prices on Amazon:

Precautions, tips, and Recommendations for Growing

  • Most of Grow Lights are for indoor use only and not waterproof. So do not use the lights in dripping water or anywhere where they will get wet, water and electricity can be a dangerous mixture.
  • Cut off the power when there is a lightning strike or thundering to protect the light.
  • LEDs are very intense and may cause visual color distortion, “spots” or temporary blindness. Wear sunglasses when lights are on.
  • If the fan stops spinning, turn off the light.
  • The working environment of most grow lights is -20~40℃,45%RH~90%RH.
  • Maintain stable voltage to avoid any damaged to the light fixture.
  • Don’t touch or move when the light working.
  • Keeping LEDs Too Close Can Give Your Plants “Sunburn” That Looks Like a Nutrient Deficiency!


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