If the bulb does not light up, lift the power contact from the lamp holder when the power is off. Because the lamp holder power contact may flatten due to long-term use. These E14 LED bulbs are NOT dimmable and non-flickering. A stable and reliable light source can prevent eyestrain and protect your and your family's eyesight. High brightness (300 lumens), low power consumption (energy class A+), beam angle of 360, high transparent 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 material and high quality PC lampshade ensure its durability. The service life can reach more than 30000 hours. Suitable for indoor lighting, such as chandeliers, ceiling lights, ceiling fan light, wall sconces, desk lamps, etc. Provides a good lighting atmosphere.