To buy and for more info: http://www.scuba.com/scuba-gear-31/126037/Seac-R1-L.E.D.-Dive-Light.html
This demonstration video discusses and shows the features of the Seac R1 L.E.D. Light. The light features an aluminum barrel for corrosion resistance. Its high intensity white L.E.D. light travels farther underwater for maximum visibility and truer colors. The Seac R1 comes with state of the art ultra bright L.E.D. (Light Emitting Diode Technology) and shock and impact resistant L.E.D. bulb which will not break when dropped. The Seac R1 L.E.D. Light features 300 times longer bulb life - 10,000+ Hours! The light has a simple push button switch and outputs up to 150 lumens. The Seac R1 uses 5 AA-Cell batteries and has a battery life of 3 hours.