The supplied 120V plugs are needed to connect the building cable in the junction box according to the electrical regulations. I used lamps powered by a 12V DC transformer. A junction box is not required for low-voltage connections. So I just unplugged the 120V to 12V driver (small plastic box). They work great and are fully dimmable with my 12v dimmer. Two cons: These spotlights get hot! I tested them at 135 degrees Fahrenheit at full power. (too hot to touch) I would not use them in confined spaces or in contact with insulation. My research shows that anything below 195 degrees Fahrenheit can come into contact with drywall. Second, I ordered a second set of 4 warm white bulbs and the color is significantly different from the first 4 warm white bulbs I ordered.
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