TCP 33118Q41K Fluorescent PL Quad Tube - 75 Watt Equivalent (only 18w used) Cool White (4100K) 1150 Lumens - GU24 Base Please NOTE: This lamps has a 2-Pin GU24 base Non Dimmable Lifetime: 9.1 years Watts Used/Lumens: 18 Watt/1150 Lumens Estimated Annual Energy Cost to Operate (based on 3 hrs/day): $2.17