G8LED 900 Watt G8-900 Mega LED Grow Light Reviews

The G8LED 900W grow light was made “Gear of the Year” in High Times Magazine – a pretty high accomplishment for a grow light. Read on to find out why.


This grow light measures 20.5 inches long by 14 inches wide by 3 inches deep, and weighs 23 pounds. It is written up as being a 900W light, but it only needs 540W to produce the same quality light as any 900W HPS lamp. To run, it needs 4.6A at 110V or 2.2A at 240V.

The LED bulbs have the usual long lifespan of 50,000 hours, which equates to 15 years of growing! It comes with a 2-year warranty and G8LED also offers a 90-day money back guarantee.

LED bulbs

G8LED uses LED bulbs made by top LED manufacturers such as Epistar, Optotech and BridgeLux, whose bulbs produce full spectrum light and even ultraviolet and infrared. The 8-colour spectrum emitted by the G8-900 will give your plants all the light wavelengths they need to grow fast and produce large buds. To protect the light from surges and burnouts, Zener diodes are installed in the panel. This allows you to run the G8-900 for 18 hours a day during the vegetative stage without worrying about light failure. There are also cooling fans installed at the top of the panel to dissipate the small amount of heat that the LED bulbs produce. There is little to no risk of this light burning your plants or overheating your grow tent. Each LED in the G8-900 is 3W, as this size is more effective at penetrating deep into the canopy of your plants – the G8-900 has a penetration depth of about 60 inches below the canopy, helping the light get right to the stems of your plants. There is no veg/bloom switch, but the G8-900 doesn’t need one. All of the light it emits can be fully used by your plants in all of their growth stages.


This professional level grow light can cover up to a whopping 24 square feet of ground. Since there is no optical lens reducing the power of the LED output, this light can cover a larger area without wasting any light. The G8-900 is definitely geared towards high level growers with a large setup.

How to Hang the G8-900

It is important not to hang the light too close to the plants. As this light runs very cool, it won’t burn or damage your plants, but it may cause stunted growth and discolouration if the light becomes too intense. You don’t want to hang the light too far away either, or else you won’t be making the best use of your light source. The recommended hanging height is between 26 inches and 42 inches from the canopy of your plants. At 26 inches, your plants will grow shorter and bushier; at 42 inches your plants will grow taller. Check the strain of cannabis you want to grow for its light requirements before hanging the grow light.

Grow Advice for the G8-900

During the vegetative growth stage, it is recommended to keep the light on for 18 hours a day, with 6 hours of darkness. This replicates natural summertime hours to encourage your plants to grow. Keep this up for four to six weeks. When your plants begin to flower, you should leave the light on for 12 hours a day, with 12 hours of darkness. The flowers will bloom within two weeks, with the entire flowering stage lasting up to eight weeks. As the G8-900 is a powerful grow light, you will actually need to fertilize your plants less when they are flowering, which saves you money on fertilizers and nutrient solutions. As your cannabis plants finish flowering, you will see the pistils enlarge and change colour from white to a reddish brown. That means it is time to harvest.


The G8-900 is a large and powerful grow light, perfect for the professional grower with lots of bud to grow. It is expensive, but will pay for itself in the long run with its energy efficiency and grow power. This light is guaranteed to help you grow lots of big, tasty, potent bud.

Happy growing!