Vktech 4 in 1 E27 Base Light Lamp Bulb Socket Splitter Adapter Studio Photography Support power: 250Wx4 (1000W in total) Size: Approx.10*10*11cm(L*W*H) This product is mainly used in photography. 4 in 1 studio E27 lamp socket splitter adapter It is E27 base, same fit as regular household bulb socket.