Лень щитать... Thirty seconds of shaking provides 20 minutes of light. In total darkness, NightStar will illuminate a 12-foot diameter area at 50 feet. The solid state StarCore® LED (Light Emitting Diode) is practically unbreakable, has a rated lifetime of tens of thousands of hours, and will produce 720 foot-candles of light at peak brightness. Из этих данных можно примерно пересчитать мощность :-)