I've drawn Lumi before (in all his glowing glory) and WW wanted a design sheet for others to use to reference his markings, rather then work from the costume (which can be understandably fussy).

I had a lot of fun with this and a went through a couple iterations. I wanted it to be lively yet stay functional as reference. Lumi's got that that kind of sass and a static turn-around just wouldn't do!

Just to note (in case for some reason you were sent to this ref link): This is a highly stylized take of the character and WW is open to artistic interpretations, so this is by no means law in terms of design. He even has both four-fingers and five-fingered paws for the costume/character.