An embodiment of the present invention provide a lighting module, which comprises a carrier, at least one light source disposed on and electrically connected with the carrier, a molding compound mixed with a fluorescent material to encapsulate the light source and a portion of the carrier, and a color temperature converter disposed over or doped into the molding compound. Instead of embedding watermarking information in respective pixels or by using a relation between pixels, the watermarking information is embedded as a position pattern of changed pixels in the contents. This new first stage processing results in a refined end product for further use or environmentally friendly disposal. Friction-type hand brakes may also be provided to more easily control and maneuver the two-wheeled dolly.