Philips Lighting 290254 T5 High Output Fluorescent Lamp 38 Watt 2-Pin G5 Miniature Base 3500 Lumens 82 CRI 4100K 34 Inch Length Cool White Alto T-5 bulb with a Miniature Bipin base Gives a cool white light Estimated life of 23.1 years based on 3 hours use per day