yellow ish edges???? help

why is the leaf turning kinda brown and yellow?

if thats all theri is dont worry about it

Im just going to take a shot in the dark here.....you are running a CFL light that is reflecting off the foil(causes uneven hotspots) and it is burning the tip closest to the foil??? Close or What kinda light you got and how close is it?

that could also be a "slight" nute overdose.. more info man how old are the plants and what type of soil and nutes if any?

like i said if its just that one leaf and its not spreading it is nothing to worry about

The plant is 2 months and a week
i used the miracal gro soil and nutes
under a 120w

tinfoil = hotspots