A light pipe (4) includes a conduit (6) configured to receive light at one end and to distribute the light along its length. The conduit (6) includes a combination of specular and diffuse reflecting surfaces (8) arranged to pass a portion of the light down the light pipe (4) primarily with specular reflection and to emit a portion of the light out of the light pipe (4) primarily with diffuse reflection. The reflecting surfaces (8) are substantially parallel to a longitudinal axis of the light pipe (4). A plurality of conduit (8) may be used to control the light distribution characteristics of the light pipe (4). The conduit (6) may be made from inexpensive plastic sheet materials.
