US Patent 10488022 Modular luminaire

A modular troffer luminaire includes a housing having a perimeter frame, and a first light module removably attached to the housing. The first light module is replaceable by a second light module after the modular troffer luminaire is installed, where the first light module comprises an LED light source and an optic. The modular troffer luminaire further includes a sensor attached to the perimeter frame. The first light module is controllable based on sensing information from the sensor.