The Bio Bulb™ is a full spectrum daylight bulb that uses 75% less energy than a standard light bulb. The Bio Bulb 100w bulb actually only uses 25w of electricity but is brighter than an ordinary 100w light bulb, putting out a massive 1750 lumens. & the Biobulb closely replicates daylight, which may improve mood, nighttime sleep & daytime energy. Anyone who hates the short winter days & longs for summer may find a Biobulb's flicker-free white light helps to restore their natural equilibrium. Biobulbs are ideal for reading & most pleasing to the eye. They are particular suitable for people with age-related macular degeneration, as the quality of light makes reading easier. A Bio Bulb daylight bulb also radiates less heat than a standard bulb & lasts around 10, 000 hours, or seven years. Length 100w 13.5cm, 60w 12.5cm. Colour rendering index of 85. Available in bayonet & screw fittings. Biobulb – the energy-saving, full-spectrum daylight bulb. Biobulb uses 75% less energy than standard incandescent light bulbs, so it saves energy & is kind to your pocket too. That’s not all; Biobulb gives off less heat than a standard bulb & lasts up to 10, 000 hours. 25W (100w equivalent). How’s that for helping reduce the planet’s electricity use! Biobulb produces up to 1750 lumens Colour rendering index of 85 Correlate Colour Temperature of 6400k (standard bulb is 2700K–3000K) Flicker-free