what didmi do?

Put my lady in a new room. Think it was way too hot, so I switched he light down to 400. This looks like fer burn to me though.

Is this overheating lack of air flow or fert issues?

Don't even have to do a closer look.
Light bleaching.
18" between the canopy and the hood/wing lowest edge. 24" for a 1K light.

Was with a 600, but it wad over 24 inches away...

Heat stress bro. I keep my 600w 8-10 in above canopy and no problem in my 2x4' closet. Just get a thermometer, tie a string and hang it down your light to top of your canopy. Check the temp during on times and move light up if it's too hot, down if not hot enough. I keep mine around 78-82 directly below the lights. Ambient room temp is around 72-76.

I was reaching 30c didnt think that eas too high.... Rip plant

It's not all lost, if you can raise the lights raise them, if not then try to bend some of your buds so they are lower away from the lights.

Ouch, too hot.

Assuming your not using any co2? Get an exhale bag may help that plant come back. Looks like a fast heat spike. You run lights on during the day?

Exhale bags are overpriced shit. Grow some shrooms along your plants. Legal or illegal both works. CO2 doesn't do shit anyways if the growing environment isn't optimized.