This Alpha 2.5/4K Complete System Kit from K5600 Lighting builds around the Alpha 4K HMI fixture with fresnel and ceramic lenses, 4-leaf barndoors, a 50' head cable, and the Alpha 2.5/4K ballast for operation. The K5600 Alpha 4K is a unique HMI head that employs a revolutionary design which pairs a high efficiency quartz composite reflector, which out-performs aluminum reflectors by 15%, with structural air vents that allow the head to run cool enough to angle straight down during operation. The "Open-Eye" construction permits a slim 13.4" profile which accepts front accessories including lenses that make the Alpha 4K the smallest 4K Fresnel around.