the dodgy one is about 2 weeks, the others around one week. I thought the HID wasn't the most ideal, but I haven't any fluoro's - so I raised up really high practically to the top of the closet, but I also thought that by doing that I'm significantly reducing the light intensity that's reaching the plants - which if I remember correctly operates on the inverse square law. meaning every 6 inches farther away the light(s) are from the plants there results in an exponential drop in luminous intensity. so that's 20,500 lumens at the point source, and as its distributed over more area the intensity is diluted.