The 4W 12 Volt DC Fancy Round Dimmable LED Bulb (E27) low-voltage bulb offers low heat output and power-saving lighting with 350 lumens. It efficiently replaces 40W incandescent bulbs with up to 87% energy savings; a 25,000-hour lifespan reduces energy consumption too. This 12 DC bulb is compatible with 12V DC constant voltage drivers.