*Please Note that these lamps may not work with some unbranded HF control gear* This is a 12.5W 4Pin (GR10q) LED 2D made by GE. The colour temperature is 835 (standard white) and has a lumen output of 1500. This lamp is a direct replacement for the standard 28w 4Pin high frequency compact fluorescent lamps only. With an average lifespan of 40,000 hours it lasts 2.5-3 x longer than CFL\'s. The Energy rating is A+ and has a colour rendering index of 80. This lamp contains no mercury or lead. Please note that this lamp will not work with an emergency fitting. GE partcode is 93039477