Let this pack of 4 dimmable light bulbs take the spotlight in your home. With an A+ energy rating, featuring- a retrofit pin base, 4 watts and 345 lumens, they’ll light up your home instantly. This fabulous four use the latest LED technology and components to ensure superior light output and to offer excellent energy savings when compared to halogen or incandescent equivalent products. Perfect for brightening up your living room for up to 15,000 hours. Pack of 4. 4 watts. Energy efficient. 10 yrs bulb life. Can be used with a dimmer switch. Colour rendering index 80 - this is a scale from 0 to 100% indicating how accurate a light source is at rendering colour. The higher the better. Colour temperature 2700K. 0.5 pf. Rated luminous flux 345 lumens. This is a measure of light and indicates the power of the light emitted. Rated lamp life 25000hrs. Number of switches 40000. Smart lighting information:Suitable for indoor use.