How many watts do you need per square foot of growing space?

Grow lights for indoor plants require 20 or more watts (power draw) per square foot of plant coverage. The wattage per square foot in the grow space can be increased up to a maximum of 50 watts per square foot. Above this amount, the indoor plant light intensity may be too strong and can stunt the growth of the plants.

G8LED indoor grow lights have recommended growing area coverages listed on the product pages. For example, the C3 Enhanced Full Spectrum grow light cover 25 square feet (5×5). These guidelines help the grower plan space requirements. The number of indoor plant lights can be increased or decreased depending on the specifics of the indoor growing project. Another important consideration when planning for your grow room is the PAR (Photosynthetic Active Radiation) and PPFD (Photosynthetic Photon Flux Density).

Watts per Square Foot at recommended coverage areas

Power Draw    Watts per SF

G8LED C3                 680/550             27/22

G8LED C2                 560/460             35/29

G8LED 450W              270                   23

G8LED 240W              140                   23

Supplemental lighting

Power Draw    Watts per SF

90W Flower Booster     82                   9

The 90W Red Flower Booster is a supplemental light for increasing the wattage and amount of 630nm and 660nm red color in the grow room during flowering. This light is not intended to be a standalone light. The Flower Booster should be used alongside other indoor growing lights and will increase the total Watts per square foot. Note that the G8LED Commercial Series lights (C2 & C3) have a built-in Flower Booster and do not require the 90W Flower Booster.