Abstract: A lighting apparatus comprises at least one LED module, a light frame, a base plate, a battery, a cover plate, at least two end caps, and a fixture assembly. The base plate is received in the light frame. The LED module is mounted on the base plate. The battery is received in the light frame and electrically connected to the base plate. The cover plate is deposited on a bottom portion of the light frame. The end caps are assembled to two ends of the light frame. The fixture assembly serves to fix the lighting apparatus to a wall or a ceiling. When the lighting apparatus loses the external power supply, by operating a power switch connected to the lighting apparatus, the battery can be controlled to take over powering, with power stored therein, the LED module on the base plate to illuminate for a predetermined time period.