Bulb Parameters Warm white 2700K, CRI> 80, E26/E27 screw base, energy saving LED light source, squirrel cage shape, 220-240 volts. High color rendering (CRI>80) provides vivid, natural colors. Retro ClassicInspiration comes from Thomas Edison's filament bulb. The retro squirrel cage design creates a retro and nostalgic atmosphere. The vintage bulb offers modern LED technology and lends warm colors and personality to any retro, modern or industrial dcor. High Quality & Energy SavingBulbs are made of premium quality amber glass and made of high quality LED filament. No flicker and no ultraviolet or infrared radiation, always protect your eyes. The 4W antique LED bulb is equivalent to a 40W incandescent bulb. And you could save over 90% on your electricity bills with our retro LED bulbs. Ideal DecorationWith a color temperature of 2700 Kelvin, the bulbs add a strong retro industrial style to your decorative space. Amber glass material makes vintage bulbs a good choice for bedside lamp, chandeliers, table lamp, ceiling light, etc. Perfect gift idea for antique lovers. Easy to install & DurableNo tools required. With a standard E26/E27 base, you can just install it in the socket. It only takes you 3 minutes to install the bulb. Average life of screw bulb lighting up to 25000 hours.