I think because of the flash, it looks like that.
If I’d have came back after a few weeks and my shit looked like that.. I’d think I was growing some fire lol
It's powdery mildew and it will get a lot worse in the remaining 2 weeks. Not really a good fix thats cheap this late into flower. The only solution that will actually kill the PM and not harm your flower is an AirROS machine.