Woodland Scenics JP5770 Just Plug® Lighting System Power Supply, USDescription via Woodland Scenics INPUT: 120VAC, 60Hz OUTPUT: 24VDC, 1000mA Type A RoHS Compliant Kit includes: Power Supply with 48" Cable Instructions How many lights can the Just Plug Power Supply support? The rated output for the Power Supply is 1000 milliamps (mA). To determine the total number of Just Plug LED Lights the Power Supply can support, add up the milliamps of each LED Light being used. The milliamps are listed on the light packages.