What is this white on my clones?

Had too high of a lumen bulb (at least thats what i think) and the tallest of the clones now has white on it.

Yep thats light burn,in veg you need just enough intensity to control stretch,you dont need great intensity during veg,try to stick with a higher kelvin range (5000k) if you can it will help.

thanks! i thought so but didnt want to assume and have it be some crazy mold or fungus.

yea i have three 5000k bulbs for those clones and it seems to be enough. id love to throw a 3500k-4000k bulb in there but i just cant seem to find them small enough at the stores.