Light source module

A light source module comprising at least one light bar, a reflector, and at least one bar-shaped reflection unit, wherein

• the at least one light bar comprises a plurality of light-emitting elements arranged along an extension direction,
• the reflector has at least one accommodation space accommodating the at least one light bar and a plurality of reflective convex surfaces located on two opposite sides of the at least one light bar, and
• the at least one bar-shaped reflection unit is located above the at least one light bar, extends along the extension direction, and has a reflection surface facing the light bar, wherein a cross-sectional line obtained by cutting the reflection surface of the at least one bar-shaped reflection unit along an optical axis of any of the light-emitting elements and along a direction perpendicular to the extension direction includes a convex arc line protruding toward the light-emitting elements and two concave arc lines connected to two opposite ends of the convex arc line.