The TCP 324132GX735K is a fluorescent twin tube TT lamp and consumes only 13-watts of energy. This 13TT compact fluorescent has a 4-pin 2GX7 plug in base. It illuminates a neutral white color temperature of 3500K. It will lasts 10 to 13 times longer than similar incandescent bulbs and produces 810 lumens. They are great investment that will cut back on the costs of maintenance lasting up to 10,000 hours with 12 months warranty.