Well I did say blinding light in front of the eyes so lol but i’ll Add it in for clarity’s sake. As far as downsides go, in order to do higher level light abilities, he has to be completely immobile, leaving him vulnerable. The more stronger techniques he uses, the longer he has to stay either extremely slowed or immobile, especially when he solidifies his ability. Also, he has to see where he is projecting the light in order to use it, so for example, if he were blindfolded he would be hard pressed to do much of anything