I have a 12v 300 watt power supply. I replaced 13 20watt halogen bulbs with 13 3watt LED bulbs. Questions:
should I downgrade power supply since I'm now drawing 39 watts as opposed to the 260watts I was pulling with the old halogen bulbs?
Am I correct in assuming that power usage is based on the total wattage of the lights and not the rated wattage of the power supply? If true, then my power consumption has dropped from a rough equivalent of 3 100watt light bulbs to approximately a single 40watt bulb, correct?