... 100,000 hours!2.Intelligent digital circuit control,point-touch switch with tail,three-mode dimming circuit,working voltage:8.4V ... .The range of light can reach 860m.light intensity 21500cd,Waterproof IPX4,You needn't worry about damage of the light ... the bike more easily,very convenient to use.8.The switch on the lamp tail with power LED display:power supply ...