1821 Bulb | 0.17 Amp, 28 Volt, 4.76 Watts, T3.25, E10 Base

This incandescent bulb with ANSI code 1821 uses 0.17 amps, 28 volts, and 4.76 watts. It has a T3.25 lamp shape, and E10 miniature screw base. The 1821 bulb has an average rated life of 500 hours.