This LED based unit is self-contained and requires no external power supply for installation. It is made of a high impact, clear, polycarbonate fluted lens that is UV protected and shatter resistant for durability. It is lighter, brighter, cooler, longer life and draws less than 1 amp (.2 amps). Weighs 3.5oz., stands 3" high and 2.625" in diameter. Available in 12V & 24V. NON-PMA