I know this thread is old, ancient old, but I've been considering trying to experiment with those 35w hids for at least a year now after reading this thread. Elsewhere on the net, other forums and such, all I can find is people asking if it's possible and other people saying that it's not possible and would be foolish to attempt. This is the ONLY place online I've found that someone actually experimented with this and the results, while disappointing, due to certain factors, prove that this experiment is not only possible, but probable in terms of success. It would be awesome if someone attempted this experiment and was successful because imo, it's the best alternative to cfls thus far.
pokesmot247 Reviewed by pokesmot247 on . automotive HID lights vs. cfl's Hi, I'm starting this thread to compare a variety of lights for small closet grows. First i'm posting only light outputs of 250 watt 6400K vs. 250 watt 25000K vs. automotive HID lamps. I built three indenticle boxes 24' X 22" x 36". I'm measuring output at the bottom of the box. in the first photo the box on the bottom left is the 6400K 250 watt cfl, bottom right is the car HID and the top is the 250 watt 25000K. Average light output are as follows. 250/6400K 5000lux peak was 5410 lux, Rating: 5