Used NRG NRG Varalux Professional, High-Efficiency 100 Watt DC Powered On-Camera Video Light with 4-pin XLR Cable.

One of the most advanced on-camera lights made. The revolutionary NRG Varalux Professional combines the ruggedness, efficiency, and versatility of NRG's Versalite Professional with a sophisticated electronic light management system. The varalux Professional accepts DC lamps from 20 to 100W and allows them to be instantly adjusted from 10-100% of the lamp's power. This makes it the ideal light for applications where varying distances and intensities are required because the perfect light level can be chosen without removing hot lamps or fussing with diffusion filters. The Varalux Professional uses NRG's LightGate technology which virtually eliminates color shift and conserves precious battery power. Length: 4.50", Diameter: 2.9", Height: 4.75", Weight: 1.3 lbs.