2 weeks later and although they're pulling through OK, I made a totally idiotic mistake. Normally, around 2-3 weeks into flower I turn on my wall mounted orbital fan to stir up the cold air from the intakes down low. Now, this has never presented a problem with the air-cooled HPS lights, but turned out to be a real issue with the SolarStorm. The SS is side vented and blows out some seriously hot air. It took me a week to figure out that I wasn't suffering from a Calcium deficiency... those spots were the initial signs of heat burn from the orbital fan blowing the hot vented SS air back onto the canopy! I've seen light burn before and I know what that looks like, but this is the first time I've experienced hot air burns. The pics will show that the crop is not lost, but it has suffered considerably and is no longer a decent test of the SS in regards to grams per watt, or anything. Nothing sadder than pre-maturely trimming off burnt sugar leaves, very sugary. I am still trimming off burnt leaves as they crisp, as you can see in the pics, they curl up. The AK-47 was hit the worst, directly under the SS hot air and not genetically acclimated yet to the heat out here. I turned off the SS for the pics to try to get better color rendition, but left the HPS on, so it's a bit on the yellow side.
My suggestion to California Lightworks, as already suggested in other posts, it would be nice to have some way to vent off the hot air outside the grow room (the SS adds about 4 degrees heat to the space) or reverse the fans so the cool air is drawn in from the sides, across the the heat sink and the hot air is blown straight up, where it is easier to manage.
Last edited by ShivaHand
on Tue Feb 05, 2013 9:18 pm, edited 1 time in total.