20 Halloween Skull Lights With Blue LED Lights - 1.4m Length - Halloween Ligh... These are fantastic lights for Halloween. There are 20 skulls on the set. Each skull measures approx. 7cm x 5cm and has a blue led light. The lights are on clear cable and there is approx. 50cm lead wire from the last light to the battery box. The set of lights require 2 AA batteries. (not included)