An impressive A++ energy rating with a tinted teardrop design. This spiral filament bulb will light up your life, or at least your living room. Featuring a bayonet cap fitting, 4 watts and 240 lumens: This light bulb will instantly brighten up your home. With zero UV emission, saving 85-90% energy compared with incandescent bulbs. Perfect for cutting the cost of your electricity bill. Pack of 1. 4 watts. Bayonet cap (BC) fitting. Energy efficient. 1 yr bulb life. 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 2200K. 0.5 pf. Rated luminous flux 240 lumens. This is a measure of light and indicates the power of the light emitted. Rated lamp life 15000hrs. Number of switches 100000.