A two-level LED security light is operated with a motion sensor. When an electric power is supplied, the LED security light is turned on for a low level illumination. When the motion sensor detects any intrusion, the LED security light is switched from the low level illumination to a high level illumination for a short duration time to scare away the intruder. After the short duration time, the LED security light returns to the low level illumination for saving energy. The LED security light includes a power supply unit, a motion sensing unit, a loading and power control unit, and a lighting-emitting unit. The lighting-emitting unit includes one or a plurality of LEDs which may be turned-on or turned-off by control signal generated from the loading and power control unit.

A two-level LED security light with a motion sensor. At night, the LED is turned on for a low level illumination. When the motion sensor detects any intrusion, the LED is switched from the low level illumination to a high level illumination for a short duration time. After the short duration time, the LED security light returns to the low level illumination for saving energy. The LED security light includes a power supply unit, a light sensing control unit, a motion sensing unit, a loading and power control unit, and a lighting-emitting unit. The lighting-emitting unit includes one or a plurality of LEDs which may be turned-on or turned-off according to the sensing results from the light sensing control unit. When the motion sensing unit detects an intrusion, the illumination of the LED security light can be immediately turned on to the high level to scare away the intruder.

A LED security light includes a power supply unit further comprising a first power source and a second power source, a light sensing unit, a motion sensor unit, a loading and power control unit, a time setting unit and a light-emitting unit. The motion sensor is activated at dusk and is deactivated at dawn. When the first power source is used and when a motion intrusion is detected by the motion sensor, the LED security light generate a first level illumination for a short time duration. When the second power source is connected and when a motion intrusion is detected by the motion sensor, the LED security light generate a second level illumination for a short time duration. The time setting unit is for setting the time duration of the first level illumination or the second level illumination. The first power source is a solar power while the second power source is a backup battery.

A two-level LED security light with a motion sensor. At night, the LED is turned on for a low level illumination. When the motion sensor detects any intrusion, the LED is switched from the low level illumination to a high level illumination for a short duration time. After the short duration time, the LED security light returns to the low level illumination for saving energy. The LED security light includes a power supply unit, a light sensing control unit, a motion sensing unit, a loading and power control unit, and a lighting-emitting unit. The lighting-emitting unit includes one or a plurality of LEDs which may be turned-on or turned-off according to the sensing results from the light sensing control unit. When the motion sensing unit detects an intrusion, the illumination of the LED security light can be immediately turned on to the high level to scare away the intruder.

A two-level LED security light with a motion sensor. At night, the LED is turned on for a low level illumination. When the motion sensor detects any intrusion, the LED is switched from the low level illumination to a high level illumination for a short duration time. After the short duration time, the LED security light returns to the low level illumination for saving energy. The LED security light includes a power supply unit, a light sensing control unit, a motion sensing unit, a loading and power control unit, and a lighting-emitting unit. The lighting-emitting unit includes one or a plurality of LEDs which may be turned-on or turned-off according to the sensing results from the light sensing control unit. When the motion sensing unit detects an intrusion, the illumination of the LED security light can be immediately turned on to the high level to scare away the intruder.

A two-level LED security light with a motion sensor. At night, the LED is turned on for a low level illumination. When the motion sensor detects any intrusion, the LED is switched from the low level illumination to a high level illumination for a short duration time. After the short duration time, the LED security light returns to the low level illumination for saving energy. The LED security light includes a power supply unit, a light sensing control unit, a motion sensing unit, a loading and power control unit, and a lighting-emitting unit. The lighting-emitting unit includes one or a plurality of LEDs which may be turned-on or turned-off according to the sensing results from the light sensing control unit. When the motion sensing unit detects an intrusion, the illumination of the LED security light can be immediately turned on to the high level to scare away the intruder.

In one embodiment of the invention, a digital mirror is disclosed including an enclosure; a display device mounted in the enclosure to display images at a front side of the enclosure; an image capture device mounted in the enclosure adjacent the display device to reduce parallax error; lights mounted in the enclosure adjacent the display device; and a light diffuser mounted to the enclosure around the display device over the one or more lights. The one or more lights provide lighting in front of the display device and the image capture device captures images in the field of view in the front. The light diffuser diffuses and softens the light emitted by the one or more lights. Alternatively, the image capture device may be mounted on an articulated arm that may be used to capture and display various angles in the filed of view of the digital mirror.

A luminaire can comprise a system that automatically adjusts light output from the luminaire to control light level in an illuminated area. The system can increase light output if the light level in the area falls below a target light level or decrease light output if the light level in the area rises above the target. For example, when the area is illuminated by a combination of sunlight and luminaire light, the light level can be maintained at the target level by gradually decreasing light output as the sunlight contribution increases in the morning and by gradually increasing light output as the sunlight contribution decreases in the evening. The system adjustments can take into consideration whether the light level is offset from the target due to a change in the target or a short-term fluctuation that may be due to a cloud temporarily blocking the sun.

A lighting system includes a control unit for controlling brightness level of a light source based on a photosensor output signal and a motion sensor output signal. The control unit may increase the brightness level of the light source as ambient light level decreases, or decreases the brightness level as the ambient light level increases. The control unit may also increase the brightness level to a maximum brightness level when motion is detected.

A method of controlling a plurality of light fixtures. The method includes determining first light outputs for each of the plurality of light fixtures. The method also includes determining a first spectrum of light reflected off of a surface. The method further includes determining a first difference between the first light outputs and desired light outputs for each of the plurality of light fixtures. The method also includes determining a second difference between the first spectrum of light reflected off of the surface and a desired spectrum of light reflected off of the surface. The method further includes calculating an updated output spectrum for the plurality of light fixtures based at least in part on the first difference and the second difference. The method also includes determining a second set of light source output values based at least in part on the updated output spectrum.