Will the Low Voltage LED lamps work with my existing transformer?   Low Voltage LED lamps are compatible with magnetic transformers used with VAC lighting. If you have an electronic transformer one LED lamp may not work due to its very low power consumption. To work properly most electronic transformers require a minimum load greater than the 3-watt used by our LED Spot Lights. When connecting a few LED lamps to one transformer the load increases to a point where the use of an electronic transformer is acceptable.