Lighting with air quality and hazard monitoring

1. A sensing and lighting device, comprising:

a lighting fixture comprising a housing and a light emitting diode (LED) light source that is configured to emit an illumination light, wherein the LED light source is positioned at least partially inside the housing;

a sensor positioned outside of the housing and configured to detect a hazard condition; and

a power source, wherein the LED light source is powered by the power source via a first electrical connection, wherein the sensor is powered by the power source via a second electrical connection, and wherein the LED light source is configured to flash the illumination light to indicate a detection of the hazard condition by the sensor.

2. The sensing and lighting device of claim 1 , further comprising a wireless transmitter, wherein the wireless transmitter wirelessly transmits air quality information provided by the sensor.

3. The sensing and lighting device of claim 2 , wherein the air quality information indicates whether one or more air pollutants are detected.

4. The sensing and lighting device of claim 1 , wherein the hazard condition includes one or more of fire, smoke, carbon monoxide, and natural gas.

5. The sensing and lighting device of claim 1 , wherein the hazard condition includes earth quakes.

6. The sensing and lighting device of claim 1 , further comprising a wireless transmitter, wherein the wireless transmitter wirelessly transmits information indicating the detection of the hazard condition by the sensor.

7. The sensing and lighting device of claim 1 , further comprising a siren, wherein the siren emits a sound in response to the detection of the hazard condition.

8. The sensing and lighting device of claim 7 , wherein the LED light source stops emitting the sound in response to the sensor indicating that the hazard condition is no longer detected.

9. The sensing and lighting device of claim 1 , wherein the LED light source flashes the illumination light in response to the detection of the hazard condition.

10. The sensing and lighting device of claim 9 , wherein the LED light source stops flashing the illumination light in response to the sensor indicating that the hazard condition is no longer detected.

11. A sensing and lighting device, comprising:

a lighting fixture comprising a housing and a light emitting diode (LED) light source configured to emit an illumination light, wherein the LED light source is positioned at least partially inside the housing;

a sensor positioned outside of the housing and configured to detect a hazard condition;

a driver that provides power to the LED light source; and

a control device configured to control the driver to control the power provided by the driver to the LED light source based on whether the hazard condition is detected by the sensor.

12. The sensing and lighting device of claim 11 , wherein the control device comprises a 0-10 v circuit that provides a 0-10 v dim control signal to the driver and wherein the 0-10 v circuit changes the 0-10 v dim control signal to flash a light emitted by the LED light source in response to a detection of the hazard condition by the sensor.

13. The sensing and lighting device of claim 11 , wherein the control device comprises a relay that receives an AC power signal and outputs a switched AC power that is provided to the driver and wherein the control device switches the switched AC power on and off to flash a light emitted by the LED light source in response to a detection of the hazard condition by the sensor.

14. The sensing and lighting device of claim 11 , further comprising a wireless transmitter, wherein the wireless transmitter wirelessly transmits information indicating a detection of the hazard condition by the sensor.

15. The sensing and lighting device of claim 14 , wherein the hazard condition includes one or more of fire, smoke, carbon monoxide, and natural gas.

16. The sensing and lighting device of claim 11 , further comprising a siren, wherein the siren emits a sound in response to a detection of the hazard condition.

17. A system of sensing and lighting devices, the system comprising:

a first sensing and lighting device;

a second sensing and lighting device; and

a wireless control device that wirelessly receives air quality information from the first sensing and lighting device and from the second sensing and lighting device, wherein the first sensing and lighting device and the second sensing and lighting device each comprise:

a lighting fixture comprising a housing and a light emitting diode (LED) light source that is at least partially in the housing and configured to emit an illumination light;

a sensor positioned outside of the housing and configured to sense air at the sensor; and

a power source, wherein the LED light source is powered by the power source via a first electrical connection, wherein the sensor is powered by the power source via a second electrical connection, and wherein the LED light source is configured to flash the illumination light to indicate a detection of a hazard condition based on a sensing of the air by the sensor.

18. The system of claim 17 , wherein the air quality information indicates whether one or more air pollutants are detected.

19. The system of claim 17 , wherein the air quality information indicates whether a hazard condition is detected and wherein the hazard condition includes one or more of fire, smoke, carbon monoxide, and natural gas.

20. The system of claim 17 , wherein the power source ef is external to the housing.