The 4000W HMI Fresnel Light Kit from CAME-TV includes the Fresnel head, 4000W HMI lamp, and 2.5/4kW electronic ballast. The ballast comes with safety features such as over-voltage, over-temperature, and short-circuit protection. The ballast is rated 2.5/4kW, is dimmable from 50% to full, and has a flicker-free mode. The A.L.F (Active Line Filter) and P.F.C ensures consistent color output, despite dimming or main voltage fluctuations. It is compatible with all 2500 to 4000W Fresnel and PAR units.