This highly versatile Lamp head and Ballast are capable of supporting 1200w, 2500w and 4000w HMI, giving you ultimate flexibility for long shoots in the field. It is compatible to all Briese Umbrellas from the 77 to the 330. Powered by a #2 camlock connection which is adaptable to household plug for 1200w operation or bates stage pin connectors for 2500w or 4000w. The ballast is also auto sensing so it can be fed 110v or 220v with no issue. A 15m extension cable is available for booming or extending the Briese light over set.