Systems, methods, mobile computing devices and computer-readable media are described herein relating to light-based positioning. In various embodiments, light sources (106) may be commissioned to selectively energize one or more LEDs (520) to emit light carrying a coded light signal. The coded light signal may convey information about a location of a lighting effect (102) projected by the one or more LEDs onto a surface (104). In various embodiments, mobile computing devices (100) such as smart phones or tablets may detect these coded light signals from the lighting effects and/or from the light sources, extract the location information, and utilize it to determine their locations within an environment.