An impressive A++ energy rating, a bayonet cap fitting, 7 watts and 1055 lumens, this pair of bulbs are ideal for illuminating your room. Lasting up to 15,000 hours, they save 85-90% energy compared with incandescent bulbs with zero UV emission. Designed to omit a warm light almost instantly at the flick of a switch. Pack of 2. 7 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 2700K. >0.5 pf. Rated luminous flux 1055 lumens. This is a measure of light and indicates the power of the light emitted. Rated lamp life 15000hrs. Number of switches 100000.