The smart lunar has a 25 lux output giving you a steady beam with side visibility the integrated lens switch makes it easy to cycle through the 3 light functions high low and flash mode and power output lasts up to 20 hours fully weatherproof the smart lunar39s tough construction is made to withstand extreme weather conditions the smart rear led light is bright visible from up to 1 mile away keeping you safe and visible to other road users during your ride easy to fit the