Our M-Series offers high efficiency power solutions for both indoor and outdoor lighting applications. The M-series are small in mechanical size, multi-functional, low-wattage, low-cost. The M38-U is a 30-Watt, Class 2, Single Output, Switch-mode, LED Driver, C/C, w/AC-DIMM® trailing edge dimming (ELV) over the full input voltage range from 110-277VAC.