Fancierstudio 4 Socket Adapter 4 in 1 Adapter Holder E27 Bulb Lamp Light Socket Splitter For Photo Studio By Fancierstudio 68014 Bulbs installed in 1 single socket at the same time Allows user to change color temperature quickly and easily Operated with 4 day-light studio light bulbs E27 Base convert your single E27 base to four easy to use It suits for studio daylight bulbs in photographic use