|Ecology meets Economy! ROL (Reverse Offset Lens) technology produces a whopping 1,000 candlepower in this powerful package. Featuring three distinct lighting options, the included 2 AA batteries will power the Econom for up to 100hrs in the flashing mode and a recharging port allows you to upgrade to rechargeable batteries in the future. The high and low constant modes have a 7hr and 20hr runtime, respectively. A low battery indicator keeps you from getting caught in the dark.