@Aurora11 meh, help is help whether or not you think the answer is bleh. I didn't see anyone else responding, so half ass answer is better than being ignored? Like if we're gonna go to the moon, I'd rather some Russian half ass attempt to man a rocket over not going at all..... If we are gonna use analogies.
emissive means having the power to radiate something, especially light, heat, or radiation.
how bright during the day with lights on
how bright during the night with lights on
how bright during the day with lights off
how bright during the night with lights off