White, like the snow in my brain

M: I have to wear my plain nightie to school today so the light can shine all the way through. Mr B said so.
D and I: Hunh?? (Mentally slow since it’s morning, but pretty sure Mr B is not some strange pedophile)
M: Because my nightie is all white and we’re all supposed to wear white. For the lights!
Me: Oh! (the mental light goes on) Is your dance party today? White does look neat under blacklights!