Descriptions : This product is mainly used in photography. It is a 3  in 1 studio E27 lamp socket splitter adapter for studio daylight bulbs. It allows 3 /bulbs installed in one single socket at the same time. Each socket on the adapter can support up to 250W. So it support up to 750/1000W in total. This product idea for more lights for photo or video， if you want to upgrade your single socket lights， convert a single bulb light to 3 bulbs light， this is the best choice. It is E27 base， same fit as regular household bulb socket. Specifications: Base type: standard E27 base Support power: 250Wx4 (1000W in total) Color: white Size: 3 in 1:10x11cm(R x H) Shell material:PBT Nominal voltage:110V-240V Suitable for:Home and Studio daylight bulbs in photographic use.1 x  Base socket adapter (The bulbs !#!amp!*! holder are not included.)