Lens material: polycarbonate plastics Lamp base material: aluminum alloy& stainless steel Bracket material: aluminum alloy& stainless steel Light source: LED Military-grade components: The components built-in will be made to Military grade, All the military grade components can improve the flash precision( ± 1% ) , high configuration can prove more precise and more reliable and stable. Lifetime can reach more than 10 or 15 years. Built-in two sets of circuit-control board: If service circuit board fails, the other circuit will be operated automatically Photo-sensor -------- turn off at daytime and automatically turn on at nighttime or insufficient light Light circuit controlled by microprocessor single-chip Bird spike on the top of dome Voltage: AC220v-240v Power: d20w Flash frequency: steady burning Lifetime: 10, 000hours Effective intensity: > 32.5cd( T= 0.74) H5km Photo sensitivity: 300LX( adjustable) Working temperature: -40C-+ 60C Protection grade: IP65 Installation size: base dia.220mm 4* M13 mounting hole on PCD 180mm