The Norman Lamps 28ESB is a T2 incandescent miniature bulb engineered for precise, reliable indicator and pilot light service in professional and industrial environments. Operating at 28V and drawing only 0.04A at 1.12W, this compact tubular lamp is designed for low-current circuit applications where accurate voltage and current draw are critical to system performance. The T2 tubular glass envelope measures 0.90 inches in overall length and 0.25 inches in diameter, making it one of the smallest form-factor incandescent lamps available for slide-base sockets. Its short glass length profile is specifically suited for space-constrained fixtures and panel-mount housings where a standard-length lamp body will not fit.

Fitted with an ANSI Slide Base #5, the 28ESB installs with a simple plug-in motion into compatible T2 slide base sockets widely used in telephone switching equipment, nurse call stations, corridor indicator lights, utility panels, power plant displays, broadcast equipment, and elevator control systems. The C-2F coiled-coil filament construction provides consistent, stable light output rated at 1,600 end foot candles, delivering focused illumination well-suited to color-lens indicator applications. As an incandescent lamp, the 28ESB is fully dimmable and produces a warm, continuous-spectrum light compatible with colored filter lenses across the visible spectrum.

With an average rated life of 6,000 hours, this T2 incandescent bulb offers a substantially longer service interval than many comparable miniature lamps in the same voltage class, reducing replacement frequency in hard-to-access panel locations. The filament and glass envelope are engineered to withstand the vibration and operating conditions common to industrial control and communications equipment. Norman Lamps supplies this bulb in single-piece quantities, with a full case available at an order of 10 units, making it practical for both single-replacement maintenance needs and stocking purposes.

• T2 Incandescent Miniature Bulb: 28V, 1.12W, 0.04A with C-2F coiled-coil filament for stable, low-current indicator service
• ANSI Slide Base #5 (TS5): plug-in installation compatible with T2 slide base sockets in telephone, medical, utility, and industrial panel fixtures
• Short glass body measures 0.90 in. length x 0.25 in. diameter, ideal for space-constrained housings and panel-mount indicator slots
• 1,600 end foot candles output with fully dimmable incandescent operation, compatible with color-lens indicator assemblies
• 6,000 average rated life hours for reduced maintenance frequency in hard-to-reach control panel and corridor light applications
• Sold individually; order 10 for a full case — suitable for both single maintenance replacements and inventory stocking

Tags: 28esb, bulbs, short, 28v, slide #5 base