I'm using a 12-15 year old BK-40 (pre Amazon). Even back then it came with a 12" cord but an extension cord to the outside timer works fine. Mine hangs on a 12" plant hanger on the corner of the shed in the yard, is on 6 hours a night mid May to mid September and just this week I replaced the burnt out bulb for the 2nd time. Tapping it lightly or using a blow gun occasionally will keep the grids clean. Put it away in the shed in the off season and you won't go wrong. Old school that works.