Light Emitting Diodes(LED)flashlights feature standard leds which run at sub-watt levels CREE LEDs which are offered in multi-watt versions.LED flashlights come in many wattage versions,use 3 watt high power LED flashlights Until recently,LED flashlights were only effective as a close range flood light, but they have much longer battery life than their incandescent counterparts.Obviously, battery life falls as the the watts increase.The design of the circuitry and the quality of the reflector effect projected light of any LED flashlight.