Board Thread:General Discussion/@comment-3190872-20121225192722/@comment-2116776-20130324182725

SolariusFlare wrote: No it isn't, Kokurai is Black LightING

Kurorai is black lightNING

...Please do not use Google. :<

I didn't, rai mean's lightning right, along with kaminari. And koku can also be used for black as the ephilet for fairy tails Acnologia, The Black Dragon 黒龍, Kokuryū, would suggest. Black light would probably be Kurohikari or kokuhikari