The 120MB is a T-2 1/2 miniature telephone bayonet lamp designed for indicator and signaling applications requiring 120V operation. It features a CC-3A filament type with a rated current of 0.025A (±10%) and delivers 0.32 MSCP (±25%) and 4.02 lumens (±25%) of light output. The lamp is rated for an average life of 10,000 hours, making it suitable for long-term use in telecommunications, control panels, and instrumentation where reliable low-power illumination is required. Its compact T-2 1/2 form factor and bayonet base provide easy installation in standard miniature lamp sockets.