Specification: Base: G4 Dimmable: yes Power: 3.5W Lumen: 320LM Size: 1.48in/0.47in Net Weight: 0.2ou CRI: Ra>80 Voltage: AC 110-120V CCT: White 6000K Material: ceramic body/crystal glass cover Beam angle: 360 degree Package: 5pcs It is recommended to use a LED dimmer / SCR IR Dimmer to control the brightness. Using a traditional dimmer will result in flicker or light wane. Attention: ①This G4 LED bulb is powered by AC 110-130V circuit,CANNOT WORK under 12V or 240V circuit. ②Lights may flicker on low setting, this is a normal phenomenon. You can avoid working under low setting. ③Make sure you get the correct size. G8 Base is wider than G4 Base(Please check the contrast picture). ④If the bulb is not compatible with your fixture (or dimmer), it may not work, or it will continue to flicker. Please return. ⑤If you receive a defective bulb, or if there is a problem, please describe your issue in the email, take a photo and attach your order number, we will arrange to replacement ASAP. ⑥Do not put the bulb in outdoor fixture or enclosed fixture. Otherwise, it will shorten the lifespan of the bulb.