Modular luminaire

1. A modular troffer luminaire, comprising:

a housing having a perimeter frame and a back cover attached to the perimeter frame;

a first light module removably attached to the back cover, wherein the first light module is replaceable by a second light module after the modular troffer luminaire is installed, wherein the first light module comprises an LED light source and an optic, and wherein a light emitted by the LED light source exits the housing between sections of the perimeter frame; and

a sensor attached to the perimeter frame, wherein at least a portion of the sensor extends down through the perimeter frame and wherein the first light module is controllable based on sensing information from the sensor.

2. The modular troffer luminaire of claim 1 , wherein the sensor is replaceable by a second sensor.

3. The modular troffer luminaire of claim 2 , wherein an electrical cable coupled to the sensor and used for providing a first electrical power to the sensor is usable for providing a second electrical power to the second sensor after the sensor is replaced by the second sensor.

4. The modular troffer luminaire of claim 1 , wherein the sensor is replaceable by a non-sensor device.

5. The modular troffer luminaire of claim 1 , wherein the perimeter frame comprises a knockout section that is removable from the perimeter frame and wherein removing the knockout section from the perimeter frame leaves a hole in the perimeter frame for attaching a device to the perimeter frame.

6. The modular troffer luminaire of claim 1 , further comprising an electronics compartment, wherein a driver that provides power to the first light module is positioned in the electronics compartment.

7. The modular troffer luminaire of claim 6 , further comprising a low voltage electrical wire extending between the electronics compartment and the sensor, wherein the low voltage electrical wire is used to provide power to the sensor.

8. The modular troffer luminaire of claim 6 , further comprising a spare low voltage electrical cable that is routed between the electronics compartment and the perimeter frame.

9. The modular troffer luminaire of claim 1 , further comprising a power receptacle attached to the housing, wherein the power receptacle comprises a port coupled to an input power wiring of the modular troffer luminaire and wherein the port is configured to be connected to an auxiliary power supply.

10. The modular troffer luminaire of claim 9 , wherein the power receptacle comprises a second port coupled to one or more dim control inputs of a driver of the modular troffer luminaire by one or more electrical wires and wherein the second port is configured to be connected to a dim control device.

11. The modular troffer luminaire of claim 9 , wherein the power receptacle is a Class 1 receptacle.

12. A modular troffer luminaire, comprising:

a housing having a perimeter frame and a back cover attached to the perimeter frame;

a first light module removably attached to the back cover, wherein the first light module is replaceable by a second light module after the modular troffer luminaire is installed, wherein the first light module comprises an LED light source and a light emitting panel, and wherein a light emitted by the LED light source exits the housing between sections of the perimeter frame; and

a sensor attached to the perimeter frame, wherein at least a portion of the sensor extends down through the perimeter frame and wherein the first light module is controllable based on sensing information from the sensor.

13. The modular troffer luminaire of claim 12 , wherein the sensor is replaceable by a second sensor or a non-sensor device after the modular troffer luminaire is installed.

14. The modular troffer luminaire of claim 13 , wherein an electrical cable coupled to the sensor and used for providing a first electrical power to the sensor is usable for providing a second electrical power to the second sensor after the sensor is replaced by the second sensor.

15. The modular troffer luminaire of claim 12 , wherein the perimeter frame comprises a knockout section that is removable from the perimeter frame and wherein removing the knockout section from the perimeter frame leaves a hole in the perimeter frame for attaching a device to the perimeter frame.

16. A modular high bay luminaire, comprising:

a housing;

an enclosure attached to the housing, wherein the enclosure comprises a knockout section that is removable from the enclosure;

a light module attached to the housing, the light module comprising a first light emitting diode (LED) light source and an optic, wherein the first LED light source is replaceable by a second LED light source after the modular high bay luminaire is installed; and

a first sensor disposed in a cavity of the enclosure, wherein the first sensor extends down through a hole in the enclosure and wherein the first sensor is replaceable by a second sensor.

17. The modular high bay luminaire of claim 16 , wherein the optic is replaceable by a second optic.

18. The modular high bay luminaire of claim 16 , further comprising a second enclosure attached to the housing, the second enclosure having a cavity for positioning a device therein, wherein the housing is positioned between the enclosure and the second enclosure.

19. The modular high bay luminaire of claim 16 , wherein a power supply configured to provide power to the light module is positioned in a cavity of the housing and wherein removing the knockout section from the enclosure forms a hole in the enclosure for positioning a device therethrough.

20. The modular high bay luminaire of claim 16 , wherein the sensor is coupled to a driver positioned in the housing by a low voltage electrical wire and wherein the sensor is powered by the driver.