im not sure about light burn it just does not look a lot like it to me and not with only 80w i dont care how close it is i run 3000w at may 1 foot away at times with no light burn. pay close attention it could be bugs as they are not always easy to see. could also be lack of light or what ever that other plant is in the soil. note the gnats lay eggs in the soil and when they hatch they mess with the roots. some plants have messed up leaves for a bit when they are young. i hope this helps