[Note]: Size: 12mm*36mm, please note that this bulb is larger than the traditional halogen bulb. See the second image for details. For 12 volt (AC12V and DC12V) lighting fixtures only. Not dimmable, please do not use dimmers or unstable 12 volts, otherwise the bulb will flicker or make noise.Technical Features: Watt: 3W LED bulb, equivalent to 20W T3 halogen bulb, Volt: AC/DC 12V, warm white 3000K. If you use this bulb to replace a halogen lamp, the bulb flashes (blinks) after installation;There are two ways to avoid flickering: 1. Replace the transformer with an LED driver;2. Keep one halogen lamp in your lighting system, dont install all LEDs.[Application]: Easy installation: Standard G4 base, can be easily installed in place of ordinary halogen bulbs. G4 LED bulbs are used in landscape lighting, RV, patio, garden, lawn lights, hockey lights, cabinet lights, counter lights, post lights, recessed lights, etc service life.[Environmental protection and energy saving]: The service life is more than 20000 hours, saving the energy and maintenance cost of frequent bulb replacement. Save electricity bills: Replace 20W halogen bulbs with 3W LEDs and save 85% on your lighting electricity bill. No lead or mercury; no UV or IR radiation.