Wenzhou Korlen Electric Appliances Co., Ltd.
Bike light comparison of a 3xAA 1 watt super bright LED (early generation), Vs a 270 Lumen 3xAAA battery torch Vs a $40 ebay 1800 Lumen Cree XML T6 LED (no affiliation). The results for the XML T6 are terrific! It has three brightness settings plus flash mode, and has extrordinary brightness with excellent beam spread. Battery is 6.4Ah. Battery life is 60 minutes plus. On a 14 deg night, casing temp after 5 mins was 42 C on high. After 15 mins was 58 C, then switched to Low, temp dropped to 48 C after 30 mins, then rose to 51 C after 45 mins.