Ahem! Mercury vapor works fine. I've done it and while it is NOT as good as MH or HPS it is far better than halogen, the MV also has UVB spectrum that no other HID has, and UVB produces more THC
lordsoth666 Reviewed by lordsoth666 on . using flood lights aight i found these lights in tha garage and i wanted to know how far away i have to have them from the plant this light is 1280 lumens 90 watts. so is this even a good light to use? Rating: 5