The biobulbtrade is a full spectrum daylight bulb that uses 75 less energy than a standard light bulb the biobulb 100w bulb actually only uses 25w of electricity but is brighter than an ordinary 100w light bulb putting out a massive 1750 lumens and the biobulb closely replicates daylight which may improve mood nighttime sleep and daytime energy anyone who hates the short winter days and longs for summer may find a biobulbs flicker free white light helps to restore their natural equilib