Philips 424036 3.5-Watt LED T3 Desk and Cabinet G4 Base 12-Volt Light Bulb Philips 3.5-Watt Energy Saving LED T3 desk and cabinet light can replace your 20-Watt halogen T3, saving you up to $27.23 in energy costs Provides a soft, white light For use in 12-Volt fixtures G4, Bi-pin base T3 desk and cabinet light lasts at least 15 years Contains no mercury