The tri-phosphor is a remarkable improvement in the coating technology of fluorescent lamp and the tri-phosphor lamps provide a superior a superior lumen and a better color rendering.possibly producing any color required. In addition, they consume 10% less energy than any standard fluorescent lamps.The lamps are widely selected in shops. department stores,banks,offices and at home. Desc Watts Lamp Volts Lamp Current Lumens Life Base W V MA LM HR FL14T5 14 82 170 1050-1220 8000 G5 FL21T5 21 123 170 1800-2100 8000 G5 FL28T5 28 167 170 2500-2760 8000 G5 FL35T5 35 209 170 3250-3450 8000 G5 FL49T5 49 194 260 4500-4700 8000 G5 FL54T5 54 125 460 4700-5000 8000 G5