CRLight G4 Base 3W LED Light Bulb, 2700K Warm White 300LM, AC / DC 12V, Equivalent to 30W Halogen Lamp Replacement, 360 Omni-direction Beam Angle, Non-dimmable, 6 Pack Constant Current Technology,Non-dimmable,AC/DC 12V,Warm White 2700K,360 Degrees Beam Angle,Replace 30W halogen bulb by 3W G4 Bi-Pin LED bulb, save over 80% on electricity bill of lighting If your working voltage is 100-240V, to make the LED light work normally,you need a AC/DC power adapter AC adapter is commonly used in household halogen bulbs.Before you replace the household halogen bulbs with this LED light, please ensure that your fixtures are 12V Please make sure the AC/DC adapter is with a high enough power whose shortage will cause burnout of the adapter. For instance, if there are 10 1.5W lights working simultaneously at a time, then the AC/DC adapter ought to have power equal with or above to 15W (10*1.5W) Average 30000 hours lifespan,10 years life (5 hours per day).Suitable for interior lighting, signal lights, lamps and fixtures of any style in bedroom, kitchen, etc.