PowerLine BA9-style T3-1/4 LED lamp is used for retrofitting and replacing incandescent bulbs that backlight annunciators in industrial plants and power utilities. Available in configurations that incorporate one or four 120 deg SMT LEDs, bayonet-based LED retrofit lamps have average life span of 100,000 hr. They come in red, amber, green, blue, and white; and are offered in voltages from 12 Vdc to 120 Vac.