If the bulb does not light up, lift the power contact from the lamp holder when the power is off. Because the power contact of the lamp holder may flatten due to long-term use. These E14 LED bulbs are NOT dimmable and do not flicker. A stable and reliable light source can prevent visual fatigue and protect your and your family's eyesight. High brightness (300 lumens), low power consumption (energy class A+), beam angle 360, high transparency PC lampshade make these 5 watt LED bulbs can be used to replace 50 watt incandescent lamps, save up to 90% electricity. The bulbs with high Color Rendering Index (CRI>80) can more accurately reflect the true color of objects and provide vivid visual enjoyment. High energy efficient 2835 SMD LED chips, cooling base ceramic and high quality PC lampshade ensure its durability. The lifespan can reach more than 30000 hours. Suitable for indoor lighting, such as chandeliers, ceiling lights, ceiling fan light, wall lights, desk lamps, etc. Provides a good lighting atmosphere.