Very powerful reflector, this is equipped with 3.0v/50ah lithium ion batteries. 4200lm ,Last all night long 10hrs full power rest night50%. Solar panel 5v/30w life time 25years, nichia SDM JAPAN chips, LED life time 50000hrs .suggest installation height 5-7 meters . Automatic on/off system , no need any wire to electricity ,no need maintenance, just clean panel every 6months from Dust. In case of any doubt or question, contact your direct provider.solarpro4less LLC.