Yellowing leaves from too much light?

[grapeman]

I just bought 3 more 600 watters and 3 8" SuperSun reflectors. The SuperSuns are much bigger than my old reflectors, and they don't seem to cast any hot spots, but I don't have any plants under them yet, so time will tell.

Pico has a thread on reflectors (don't know if it is still current but it was active up till about 1 year ago).

http://www.icmag.com/ic/showthread.php?t=51325

Anyway, the super sun was the reigning king until Pico tested the Magnum XXXL. They are close as the XXXL is only about 4% better at light distribution and a bit better in having less hot spots.