this light work as advertise for a few day . a spare bulb , keep in the base , be improperly store , force too much pressure on the bottom of the battery , which eventually flatten the spring contact at the top of the battery . the result : once the bulb be properly stow , there be little or no contact between the battery & the spring contact at they top end . this be essentially the end of the light . this happen just after the expiration of the return period . I would not recommend this product .