The Boltzen 55w High Output 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 High Output Watt video light has 40% more output than our previous 55 Watt light and now has 2 battery slots for Sony style NPF batteries. There is a built in cooling fan to dissipate heat and is barely audible at a distance of 1 meter. The CAME-TV Boltzen 55w High Output Fresnel Video Light light can be powered from AC (with included power adapter), NP Series batteries or V-Mount battery via the included V-Mount adapter cable providing convenient use on set and on location. Frequency is a strobe setting and the new light has several different effects built in. When choosing frequency it is how fast/slow the strobing effect cycles. CAME-TV engaged an independent lab to conduct standardized photobiological testing on the Boltzen series lights to which they passed. Key Features 40% Brighter High CRI (Ra96+) Adjustable Frequency Color Temperature 5600K There is 1 LED COB (Chip On Board) An umbrella mount Barndoor can easily adjust the lighting direction Dimming Knob can steplessly adjust the brightness according to users’ need. LCD Display Screen Can be powered from NP Series batteries or V-Mount Battery Filter Set includes Soft, Milky-White and Orange filters that can change the color temperature to match an existing setup or create a specific lighting look. Optional Bowens-Mount provides an easy way to mount a softbox and any other studio accessories