Lighting apparatus

A lighting apparatus, comprising:

• a driver module for converting an external power to a driving current;
• a light source comprising multiple LED chips, wherein the light source is coupled to to the drive module to emit a light;
• a main housing for disposing the driver module and the light source;
• and
• a optical plate for detachably inserting into a sliding track of the main housing via a lateral opening of the main housing so that the optical plate is replaceable, wherein the optical plate changes a light direction of the light emitted by the light source to a light opening, wherein a first surface of the light opening is substantially perpendicular to a second surface of the lateral opening, wherein the light source includes a first light module and a second light module, wherein there are two optical plates for respectively inserting into two sliding tracks of the main housing, wherein the two light modules are disposed on two sides of the driver module.