Here is before, with lighting ect. they are getting bagged neuts 10-12-12 Sent from my iPhone using Grasscity Forum mobile app
Looks like light burn to me but could also be nute burn in leaning on light burn Sent from my SM-G530T1 using Tapatalk
Well your right it chould be heat mixed with burn i keep my CFL 3-5 inches away usually i go for farther than closer my tip is add a fan and see if it helps Sent from my SM-G530T1 using Tapatalk
Nute burn, i think. Besides the obvious discolorations the upside down canoe and coloring indicate too much nitrogen.
Using a homeade decomp soil, approximately 40% perlite maybe 20% peat moss and the rest is soil, with nutrients mixed in, and it went through a transplant after that pic, its bigger now my LED fell on it to make matters worse.... Burned many many leaves, but new growth is progressing Sent from my iPhone using Grasscity Forum mobile app
Maybe try straight water, pH'd, for a week and see. Although it's hard to tell what she is going to need now that she got hurt a little bit
Plant is getting better, new growth is speeding up and damage seems to be going away slowly. Sent from my iPhone using Grasscity Forum mobile app
Update! Plant growth setting into multiple nodes  Sent from my iPhone using Grasscity Forum mobile app
Cut all old growth, plant is starting to flourish Sent from my iPhone using Grasscity Forum mobile app