if you have a 1000 watt fixture, i wouldnt bother with this UVB bulb as the light output would be so little compared to the HPS that it wouldnt make much difference. Reptile bulbs are like 15 watts
amstron Reviewed by amstron on . Best ratio of Lumens/sq. ft.? I was wondering what the best ratio of Lumens/sq. ft. for veg. & flower? I heard about 3,000 lumens per sq. ft. but I was wondering if i should keep it there all the way through, or if the plant would like an increase or decrease at some point in growth. this is for the strain "white buffallo" (white widdow x white rhino) I'm not sure if it's more predominatly indica or sativa. Rating: 5