With Luffy's speed and haki abilities, even without his awakening, I could see him beating Kizaru. With his awakening, I don't see Kizaru having a chance. He could just grab and rubberize his light attacks and send them right back.
he would probably be able to grab them and send them back but i doubt it would hurt kizaru... is very rare for a user being hurt by his own element..specially a beast like Borsalino... i wonder if light .. work in the same was as Electricity like enel... Luffy was like almost 100% inmune to him cause it was electricity.. but we are talking about Pure light here... both can be energy.. but i m not sure Luffy would be totally inmune to it
my memory is fuzzy.. but wasnt Luffy triying to .. Or evading PX lights attack on Sabaody? even kuma send them far away to save them
You have to see it like this.. a lightning striking a rubber tire wont do nothing
but a concentrated laser strong enough
(maybe one from a Lab) probably could make a hole on it.. and start setting it on fire../melting