The BF3127-0UR-028B is a miniature Bayonet Base Ba9s (T3) LED bulb featuring a 6/7 LED cluster configuration designed as a direct incandescent replacement for indicator and control panel lighting. It operates at standard voltages of 28 VDC with bipolar DC polarity (+/-), providing up to 90% energy savings compared to incandescent equivalents while delivering long operational life with no heat generation. The bulb measures 0.36" (9.14 mm) base outer diameter and 1.12" (28.45 mm) typical length, and is available in warm white, true white, cool white, red, orange, yellow, green, and blue colors. This solid-state LED design offers high shock and vibration resistance, making it ideal for use in elevators, motor control panels, industrial controls, avionics, utility control panels, theater and auditorium aisle and exit lighting, and military/aerospace indicator applications.