These are skirt lights that Dr. Dave had the genius to bring us! I like to call them the Dr. Dave's Dance Floor cause they just look so cool. These are for your skirts between the fans on the sides. Super neat way to add some more bling to your printer. This listing is for a set of 2, one for each side along with 2 printed parts diffusers.
More info can be found here: Dr. Dave's Dance Floor