Positioning system and method using lamp fixture indicator

A method comprising:

• using an optical sensor, obtaining image data of a light fixture having an indicator, the indicator including one or more of a missing light-generating device in a repeating pattern of light-generating devices in the light fixture or a body affixed to the light fixture and that at least partially attenuates light generated by one or more light generating devices of the light fixture prior to the light being detected by the optical sensor;
• determining one or more characteristics of the indicator based on the image data that is obtained;
• and
• one or more of determining a unique identity of the light fixture based on the one or more characteristics of the indicator that are determined or determining a location of the light fixture within a structure based on the one or more characteristics of the indicator that are determined.