We narrowed the hundreds of 600w LED grow lights down to the 4 best. All 4 of these lights are excellent. Which one is right for you depends on your personal needs and preferences. This post will help you decide.
600 Watt LED Grow Light Comparison Table
|Brand||Cirrus||Advanced LED||California Lightworks||Black Dog LED|
|Spectrum||full-spectrum with UVA and IR||full-spectrum with UVA and IR||full-spectrum with UVA and IR||full-spectrum with UVA and IR|
|Coverage Area||4 by 4||4 by 4||3 by 4||4.25 by 4.25|
|Best Feature||customizable using the Leaf app||10w CREE XML chips||customizable using controller||intense 5w LEDs for deep penetration|
|Weakness||price and weight||none||coverage||no customization|
|Get it if you want...||
the best spectrum and lowest heat
second best output per watt
one controller for 1000+ lights
the best output per watt
Factors to Consider When Buying an LED Plant Light
This is the actual amount of electricity the fixture will use. 600 watt LEDs use from 250 watts to 425 watts when running at full power.
Some of these lights are customizable and can be set to use less than full power. During the vegetative stage of growth, plants don't need as much light as they do during flowering. A fixture that lets you turn off LEDs (or dial back their intensity) when they are not needed will save you money in electricity costs.
All 4 of these fixtures provide full-spectrum light and also include UV-A and IR wavelengths. There really isn't much difference between these lights when it comes to spectrum.
We did not include any all-white fixtures here, because we didn't like any of the full-spectrum white LED lights as much as the four listed here. For an explanation of the difference, see out article on the best 1000w LED grow lights.
3 of these lights allow you to control the makeup of the spectrum to varying degrees. The Diamond XML 350 gives you some control on the fixture, the T300 lets you control the color makeup and intensity via a smartphone app and the SolarSystem 550 is customizable using a separately sold controller. Only the PhytoMax 400 has a fixed spectrum.
600w LED fixtures generally have an output equal to 600 watts of HPS light. For our ratings, we gave 5 stars to the fixtures whose intensity is equal to, or a bit above, that of the equivalent HPS bulb and 4 stars for an intensity lower than an HPS lamp.
Almost all manufacturers claim their LED light penetrates as deeply below the canopy as HPS light, but that is rarely the case. That said, we chose the lights here, because they actually do match, or beat, HPS light. We gave 5 stars to lights that actually beat the penetration of an HPS bulb and 4 stars if they are about equal.
This is the area in feet that the light will cover during flowering. During vegging, they can cover an additional one to two feet. So a light that covers 4 by 4 feet during flowering will cover 5 x 5 to 6 x 6 feet during vegging.
The 4 Best 600 Watt Horticultural LED Lights
Cirrus LED Systems T300 — Most Customizable Spectrum Via Leaf App
The T300 from Cirrus LED Systems (link goes to the product page) is brand-new and one of the most technologically advanced lights on the market. It was previously known as the Titan 3. Among its many groundbreaking features, the most notable is the proprietary mCOB array.
This unique COB technology has been designed to maximize power and efficiency and the result is an actual power usage of only 250 watts in a light that equals the output of a 600w HPS system.
Standard LED diodes only emit one single wavelength and many different colors of diodes are combined in a fixture to give you a full spectrum. But this obviously results in an uneven distribution. With the T300, each mCOB array contains EVERY wavelength, making for a uniform light that is much better for your plants.
Another advantage of the mCOB array is that it allows you full control over your light. Using the exclusive Cirrus Leaf app, you can completely customize your light schedule and spectrum from any Android or iOS device.
- ability to customize everything from any Android or iOS device using the included app
- advanced COB technology uses less power and provides the perfect growing spectrum
- low power usage
- lowest heat output on the market (600-700 BTU)
- high price
- as a new light, it does not have the same track record of success as lights that have been on the market for a while
- the heaviest light on this list at 26 pounds (due to extra large heat sinks)
Advanced LED Lights Diamond XML 350—Best Value 600w LED Grow Light
The Diamond Series XLM 350 from Advanced LED uses a combination of USA-made 10 watt CREE XLM chips and 3 watt Bridgelux blue and white chips. Together they provide all the light your plants need, over 11 wavelengths in total.
The powerful 10 watt CREE chips also ensure a deep canopy penetration beyond that of most LED lights and easily equal to HPS light.
The DS XML 350 also allows you to control the color and intensity of the light, so you can dial back the output when you don't need full power, saving you money in electricity costs.
Advanced LED Lights enjoy a stellar reputation among growers for providing lights that equal HPS at a reasonable cost.
- large coverage area (4' by 4' core coverage)
- Color select feature—full control over spectrum and intensity
- Deep canopy penetration—easily equal to a 600 watt HPS bulb
- US-made CREE XML chips—high quality and efficiency
- shorter warranty (3 years)
California Lightworks SolarSystem 550 — Control Hundreds of Units From One Controller
California Lightworks (link to SS 550 product page) manufacture their lights entirely in the US from American and German parts. Their lights are exceptionally high quality and they enjoy a stellar reputation in the industry as a result. Like Black Dog, they do not make bogus or exaggerated claims about their lights.
The SolarSystem 550 is California Lightworks' newest fixture and features their most advanced technologies. It uses OSRAM SSL LEDs that are rated for 50,000 hours. The spectrum and intensity can be adjusted as needed, using an external controller.
The SS 550 is the lowest-priced light on this list, but the controller is sold separately, so you'll need to add that cost in. You only need one controller to control over a thousand lights, though.
- Top-bin 5 watt Osram diodes—high power for penetration and intensity equal to HPS
- complete customization using the external controller
- very low price relative to competitors
- controller need to be purchased separately (product page)
- smaller coverage area than other lights on this list (3' by 4')
Black Dog PhytoMax-2 400 — Best Output and Penetration
Black Dog is the most honest LED company. This light uses 420 actual watts, so they named it the PhytoMax-2 400 (link to product page). Other companies would have called it the PhytoMax-2 600, because it is equivalent to a 600 watt HID light.
This is the most expensive light on this list, but it's also the most powerful. It draws 420 watts and easily outperforms a 600 watt HPS light. It covers the largest area of all the lights on this list (4.25' by 4.25'), too and provides an even coverage with more intensity and penetration.
- Uses only 5 watt diodes—powerful light that matches HPS in intensity and penetration
- Amazing heat management—despite 5 watt diodes, emits similar amount of heat to competitors
- Phyto Genesis Spectrum—perfectly targeted to photosynthetic peaks for optimal plant growth and yield
- No customization (same spectrum for all stages)
- High price