Things Kizaru hasn’t shown yet
Control/affect his surroundings. Examples being
- Crocodile could effect the dryness of the air and general sand
- Ace could effect the heat and general fire
- Enel could control/sense the electric currents and effect general lighting
Maybe for kizaru his more passive ability could be just always making the island he’s on seem like day time. Basically like enies lobby which happened due to mother flame or the original Uranus probably. Something that coincidentally produces a light based attack.
He should also be able to control different forms of light in general that he didn’t produce himself
A further level of that would probably be being able to produce things that naturally produce your element. Examples of that being
- Aokiji creating ice mountains + snow clouds
- Akainu creating volcanoes
- Enel creating thunder clouds
As for kizaru the main thing that produces light for us is the sun and the stars in general. So maybe kizaru can create his own sun he can use as another source of light
Idk if they’ll all have one but so far enel, ryokugyu, Caesar, and even kinda Monet have shown off a larger form when they’re completely made up of their element. If kizaru does have a similar form I think it’d be very fitting if it was named after Amaterasu the sun god. Adding even more parallels to him and luffy. Sun god vs sun god. If kizaru originally like kaido wanted to be joyboy but failed even more perfect