I'm planning to try this next week, temperatures are cooler than cfl. I run a small computer fan blowing across the bulbs and i removed the glass on the reflector. result is the housing of the reflector is not even warm. Without the fan the reflector is quit warm to the touch about as warm as a cfl. I think there is some real possiblities here. See pictures
bubbas Reviewed by bubbas 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