... output and better light distribution over the full beam area. The HMI ballasts provide the latest standards in ballast technology. Flicker ... drive adjustable from a knob on the back of the unit. Type: Hot restrike, HMI, power factor corrected (PFC) can drive ... bayonet connectors on each end, 5m foot power cord, barndoors, yoke, stand adapter. big power 4000watts HMI Spotlight flicker free cool light