CAN I SAVE IT!?

LEDs should be at least 18 inches above the top.

The light was too intense.

I don't know what type of light you got but id say either raise the light higher, maybe up to 20 inches and see how she responds or dim the light id say like 25% and see how she reacts. whichever works best for your situation and growing space

maybe 12" was too close. Try somewhere between the extremes you already employed.

yes ia gree, you had not enough lightpower, but now your plant is toasted. i see no sense in continue growingher using aplain white background i way better than those wonky silver linings, he light is reflected weired and the plants dont get better with that, if you can gt a plain withe plastic foil, or even a cardboard in white is way better

cut her down there is nothing to save