AABC Goofyboots
Active Member
I'm planning on building a grow box, i'm getting a 400w HPS grow bulb. How big of an area will it light up sufficient enough to grow the plants? I'm going to have vents going in and out, as well as a separate fan for just the bulb. The inside of the box will be lined with that emergency blanket material, mylar? i was thinking a 1.5mX1.5mX2m. I'd like to know the area that the light can provide and also how close should the bulb be to the plants? about 25-35cm?