To buy & for more info: http://www.scuba.com/scuba-gear-56/026844/Light—Motion-Sola-4000-L.E.D.-Video-Dive-Light.html
This demonstration video discusses and shows the features of the Light & Motion Sola 4000 L.E.D. Video Dive Light. The light features a State of the art ultra bright L.E.D (Light Emitting Diode Technology). High Intensity White L.E.D. light travels farther underwater for maximum visibility and truer colors. The Sola 4000 has Shock and Impact resistant L.E.D. bulbs. It features a factory sealed housings with external charging. The Dive light features a battery status light. Its beam features 80 degrees flood. The light has an optional custom cyan filter that rotates into place for daylight wide angle work. A 1″ ball mount which allows you to mount your dive light on your SLR rig and use with Ultralight arms is included. The Light & Motion Sola 4000 L.E.D. Video Dive Light has 7 Power settings from 4000 lumen to 125 lumen. Its run time is 50 minutes at full power and 15 hours at the lowest setting. It comes with a rechargeable built-in Lithium Ion battery.