Light emitting diode retrofit module for traffic signal lights

An LED lamp module, comprising:

• a housing that includes:
• a rear wall portion,
• a side wall portion extending from the rear wall portion,
• a flange extending from the side wall portion and having a front surface that defines a flange plane, and
• a spacer ring portion extending from the flange by a height H and terminating with an open end;
• a plurality of LEDs disposed inside the housing for producing diverging light;
• a power supply disposed in the housing and electrically connected to the plurality of light emitting diodes;
• wires connected to the power supply, the wires extending from the housing and terminating in a threaded electrical connector;
• a curved Fresnel lens extending across the open end for collimating the diverging light from the LEDs;
• and
• a planar outer lens disposed over the Fresnel lens for receiving the collimated light, wherein the Fresnel lens is disposed a first distance from the light emitting diodes so that the collimated light just fills and illuminates the entire outer lens.

An LED lamp module, comprising:

• a housing that includes:
• a rear wall portion,
• a side wall portion extending from the rear wall portion,
• a flange extending from the side wall portion and having a front surface that defines a flange plane, and
• a spacer ring portion extending from the flange by a height H and terminating with an open end;
• a plurality of LEDs disposed inside the housing for producing diverging light;
• a power supply disposed in the housing between the LEDs and the rear wall portion, and electrically connected to the plurality of light emitting diodes;
• wires connected to the power supply, the wires extending from the housing and terminating in a threaded electrical connector;
• a curved Fresnel lens extending across the open end for collimating the diverging light from the LEDs;
• and
• a planar outer lens disposed over the Fresnel lens for receiving the collimated light, wherein the Fresnel lens is disposed a first distance from the light emitting diodes so that the collimated light just fills and illuminates the entire outer lens;
• wherein the outer lens has a diameter of about 8 or 12 inches, and wherein the spacer ring portion height H is selected such that the flange plane is separated from the rear wall portion by a second distance that does not exceed about 70 mm if the outer lens diameter is about 8 inches and about 100 mm if the outer lens diameter is about 12 inches.