Is that just a light burn or could it be something else?

P.S. The red discoloration, as opposed to bleaching, is from direct heat source.

Yellow leafs are not often a sign of light bleaching. Light bleached leaves will often turn bright white to match the light lol could be her asking for abit more feed them darker spots look to me like the start of a phosphorus deficiency nice looking plant though I would try upping her ec abit autoflower are notorious for not needed much at the start but then soaking up the nutrients when in flower as soon as you get past say the 2nd week of flower for a auto she will soak up alot more than she did before in my experience anyway. Anyway shes looking nice few weeks left but looks like shes on target mainly healthy and going well :) Best of luck for a happy harvest :) Also that oragne browny spot on the leaf does look like she needs abit more cal mag also that might be another reason for the discoloration of the leaves if its light stress the edges of the leaves will often curl upwards so it doesnt look like that to me.