... :0.50% R&N: 80mV, Efficiency:85% 12VDC LED Power Supply Key Specifications/Special Features:Constant ... voltage rangeHigh reliability, high efficiency, low operating temperature and long lifespanHigh efficiency and lower temperatureInner with ... led sign, led box, 12V led strip, LED Neon light, LED Bulbs and and other AC power applications. 12VDC LED Power Supply with Overload Protection, High Efficiency ...