need help please

hi their, i have a problem with my auto northern lights. It had been under a 20w CFL for the first few days with no ventilation. I then put a 125w CFL in for a few hours without ventilation but it got to hot, so i switched back to the 20w until i could install an intake and outtake fan. After i installed the fans i tryed again with the 125w CFL but it still didnt do the job and the leaves were starting to go yellow by then. I decided to put a 90w LED UFO in there and now with the fans installed also the temperature is just right, but now it looks like the leaves are folding and the 2 biggest ones are starting to get yellow tips, it also looks like the middle has gone purple and i think the soil has nutrients in it. i am using emergency blankets for reflective material and have the LED 5 inches away from the plant. Does anyone know what the problem could be or is it just heat stress and now its adapting to the LED? thanks, i would apprieciate any help.problem ....jpg

You've probably burned it, and having the LED that close is not any better. From what I've read, 9" is best for seedlings and LEDs.