http://dangerousintersection.org/2007/08/21/on-light-fixtures-that-look-like-breasts/

From the Urban Dictionary:
1. boob light

A dome light mounted on a ceiling that resembles a female breast with a decorative erect nipple. They are often found in pairs in 1980 style homes.

My dad's living room is illuminated with 2 sets of boob lights.