Last week I relocated my peppers from under two 24-inch 6500k t5 lights to a 48-inch 6 tube t5 fixture set 6 inches from them. Two days later I transplanted most of the seedlings into solo cups. While transplanting, I noticed a few leaves with an almost soot looking blackness. After I finished the transplant I moved my lights up to around 8 inches thinking that I may have had the lights too close. After yesterday I had quite a few leaves that were quite black so, I moved the light up again to 10 inches. My question is if the lights really are the culprit or could there be some sort of disease causing the blackness. The temperatures with the lights at 6 inches were around 28 degrees celsius. Now that the lights are up at 10 inches they are sitting around 22 degrees celsius. This evening the plants aren't looking any better and I'm worried that I still have them too close.