the pictures aren't that good and have those damn stripes that grow lights like to put on cameras, but it KIND OF looks like the tips could have been burnt from water touching them. Im not sure if thats what it is, but in the 1st picture it really looks like either that or the light fried the tips. The 2nd picture doesn't look that bad at all. but I think you're doing hydro? which would probably cancel out dropping water on the tips. Although, I dont know shit about growing hydro. hope you figure out whats going on though. they look nice otherwise.