B22 4w led bulb with transparent surface from sylvania this b22 bulb is optically reminiscent of the traditional light bulb but has a much longer lifetime of 15 000 hours thanks to its modern and efficient led filament technology this vintage style bulb appeals to all fans of the retro look along with their wallets as it has the best energy efficiency class of a and can save up to 90 on energy features has a good colour rendering rating