The Anton Bauer EL-5 is a 5 watt Spare Bulb for the ElightZ on Camera Video Light.It also comes in comes in a 10 watt bulb. The ElightZ lamp only operates from 6 VDC source. Changing the bulb requires a few simple steps:First, wait for light to cool. Then, using thumb and index finger gently press the side grill areas of the ElightZ head module and the diffusion holder will release. Next,remove bulb by holding outer edges and pulling straight outward. Then, gently insert the new bulb while making sure the bulb pins enter the socket straight.Lastly, reinstallthe diffusion holder and the spring loaded bulb socket will secure and center the bulb.