1 pc came-tv boltzen 55w fresnel focusable led daylight with bag boltzen the boltzen 55w video light includes an adjustable fresnel lens to help focus the light and provide a longer throw. when used without the lens, the light becomes a wider flood and the included barn doors help to control the spill. this versatility allows you to go from a tight spot to a wide flood all in one continuous light. the boltzen 55 watt video light shares the exact same housing as our boltzen 30w fresnel with the exception of a built in cooling fan to dissipate the extra heat. our fan is barely audible at a distance of 1 meter. the came-tv boltzen 55w fresnel video light light can be powered from ac (with included power adapter), np series battery or v-mount battery via the included v-mount adapter cable providing convenient use on set and on location. (np series battery and v-mount battery are not optional accessories and are not included with this listing).