Multi mode electroinic switch: Momentary, Full Power, Low Power, ECO and Strobe Water and drop-resistant Advanced focus system (adjusts from spot to flood) Activity based function sets include General, Outdoor, Law Enforcement, and Tactical The ML300L offers momentary and constant-on operation, high, low, and eco modes, and an emergency strobe. The high output mode flashlight delivers 524 lumens of light for 6.5 hours, the low setting runs for 20 hours, and eco mode runs for 69 hours. You can arrange the switching sequence of these modes to suit your needs by selecting the General, Outdoor, Law Enforcement, or Military priority setting.