HELP! Light burn?

[RobM]

So I transplanted my girl into a 10 gal about a week ago... running nutes (nutrafield a/b) at about 2/3 of recomended dose as that what usually works for me over the last 2 grows.. also I use AU Roots and Go Green supps.

I'm thinking maybe wind burn so I turned the fan away etc.. then light burn (1 600w hps.. 300-400mm away)

temps are roughly 29c with humidity 50% lights on.. 26c lights off (My temp sensor is at the top of the tent so those temps will be slightly higher than real temp.. )

I run my pH between 5.8 -6.2. Ec/ppm unknown but shouod be in the zone based on last grow (currently rebuilding my ppm meter.. arduino and homemade probe thats within .01 ec before I rebuild a new probe)

The burnt spots are quite dry.. also not a watering or under water issue

[GreenhouseEffect]

Ya, I think so on the light burn, 300-400mm sounds to close to me. I burned the shit out of my poor plants with a 400 w MH at a little over 18 inches while seedlings. I think Nebula has a reccomendation for 600w HPS. Mine are finally all looking pretty good again after 4-5 weeks, but were generally in worse shape then yours. I would move that lite back right away by more then you need, and give them a rest for a while, then slowly inch it back into reccomended range.

[RobM]

Cool. I'll raise it up some more. Can't hurt