Lighting EVER have finally released 4W MR16 LED bulb with dimmable feature. Featuring the very latest in LED technology these bulbs can be dimmed on most dimmers. In order to prevent flicker, silicon-controlled rectifier(SRC) type dimmer is the best choice. It can replace 35W halogen bulb with 4W LED, which saves over 85% energy. Over 30,000 hours lifespan. With perfect MR16 shape like halogen bulb, you do not need to worry about size of this item. Input voltage is 12V AC/DC. It"s good choice for track lighting, accent lighting and recessed lighting. Lighting EVER High Quality Standard. 2 years warranty.