Light Emitting Diode (LED) based illumination devices in a lighting communications network may be commissioned into a group with a mobile electronics device, such as a mobile phone, tablet computer, etc. The identities of a plurality of LED illumination devices are determined and a request is communicated to the identified LED based illumination devices to modulate emitted light for a period of time. The modulated light is detected by the mobile electronics device, which may then determine a group of the LED based illumination devices. For example, the detected intensity of the modulated light may be used to determine the group. In another example, the physical locations of the LED based illumination devices are determined by detecting a sequence of images (e.g., video) of the modulated light, and the group may be determined based on the locations of the LED based illumination devices.