Led lighting devices with high extraction efficiencies

A system comprising a light housing and a lighting device for installation into the light housing, the lighting device comprising:

• a base comprising a connector;
• a light-emitting semiconductor device mounted on the base, the light-emitting semi-conductor device having a central axis, wherein a light distribution of light emitted by the light-emitting semiconductor device is substantially symmetric about the central axis and a maximum light intensity direction of the emitted light is substantially parallel to and coincident with the central axis;
• and
• a reflector for reflecting at least a portion of the emitted light, wherein the reflector is positioned relative to the light-emitting semiconductor device such that a combined light distribution of the emitted light and reflected light is not symmetric about the central axis and a maximum light intensity direction of the combined light distribution of the emitted light and the reflected light is angled with respect to the central axis, and wherein a position of the reflector relative to the light-emitting semiconductor device is adjustable such that an adjustment to the position of the reflector changes a direction of the maximum light intensity direction of the combined light distribution of the emitted light and the reflected light;
• and
• the light housing comprising:
• at least one wall;
• an opening;
• and
• a fitting configured to mechanically connect to the connector of the lighting device, wherein, when the connector is connected with the fitting, the central axis of the light-emitting semi-conductor device is directed toward the at least one wall of the light housing and the maximum light intensity direction of the combined light distribution of the emitted light and the reflected light is directed toward the opening.

A method of installing a lighting device into a light housing, the lighting device comprising:

• a base comprising a connector;
• and
• a light-emitting semiconductor device mounted on the base, the light-emitting semi-conductor device having a central axis, wherein a light distribution of light emitted by the light-emitting semiconductor device is substantially symmetric about the central axis and a maximum light intensity direction of the emitted light is substantially parallel to and coincident with the central axis;
• the method comprising:
• connecting the connector to a fitting of the light housing such that the central axis of the light-emitting semiconductor device is directed toward at least one wall of the light housing;
• selecting a position for a reflector to reflect a portion of the light emitted by the light-emitting semiconductor device such that a combined light distribution of the emitted light and the reflected light is not symmetric about the central axis and a maximum light intensity direction of the combined light distribution of the emitted light and the reflected light is direct toward an opening of the light housing;
• and
• attaching the reflector to the lighting device in the selected position.