Patent ID: 7808402

Claim:
A traffic lamp bulb assembly including a traffic lamp bulb, the traffic lamp bulb assembly comprising: a base configured to couple the traffic lamp bulb to a traffic signal; a first set of LEDs configured to display a first pattern meaningful to traffic control, the first pattern being of a first color; a second set of LEDs configured to display a second pattern meaningful to traffic control, the second pattern being of the first color; a first hot conductor configured to conduct current between the traffic lamp bulb and the traffic signal; a second hot conductor configured to conduct current between the traffic lamp bulb and the traffic signal; a neutral conductor configured to form a circuit with the first hot conductor or the second hot conductor; and a circuit configured to power the first set of LEDs when power is applied to the first hot conductor, and to power the second set of LEDs when power is applied to the second hot conductor, wherein the base includes a screw mount type base or a bayonet type base, the base having the first hot conductor and the neutral conductor but not the second hot conductor.