An auto-addressing method for a tiled lighting system

This invention relates to a method of controlling a lighting system (1) which has a plurality of polygonal lighting modules (3) arranged as an array, and a controlling device (7) connected to one of the lighting modules. The lighting modules are arbitrarily arrangeable by each lighting module being able to communicate with neighboring lighting modules via communication units (11) arranged at all sides of the lighting module. In an upstart mode each lighting module performs a configuration procedure, which includes: - receiving address data and lighting orientation data from a neighboring lighting module, wherein the address data comprises several address elements, which are related to a relative position of the neighboring lighting module within the lighting system; - aligning its own lighting orientation with the lighting orientation of the neighboring lighting module from which it receives address data and lighting orientation data; and - determining its own address by one of incrementing and decrementing at least one of the address elements depending on the lighting module's position relative to the neighboring lighting element, and according to a predetermined addressing plan. The lighting module which is connected with the controlling device receives initial address data and lighting orientation data from the controlling device.