Brown Spots

i have brown spots on my leaves im thinking the light burned the leaves or maybe root rot i dont know roots are tanish you can look at my grow for pictures

if they are little spots small like pencil dots then its most likely from your ph being out of range are you in hydro ? didnt see any pics (i looked for em) if your seeing your roots im guessing it is dwc so .yes if their brown and or slimy then you need to watch your temp of the water and get some hydroguard and or hydrozyme