Wireless communication control in lighting systems

A lighting apparatus comprising:

• an input port configured to receive a power signal that supplies power when the power signal is at a first level and does not supply power when the power signal is at a second level different from the first level;
• a light source configured to emit visible light and be powered by the power signal when the power signal is at the first level;
• a communication circuit configured to:
• wirelessly communicate with an electronic device, and
• be in a first mode in which wireless communication by the communication circuit is enabled and a second mode in which wireless communication by the communication circuit is disabled;
• a controller configured to:
• activate the light source,
• deactivate the light source,
• detect a set change in the power signal over a period of time when the communication circuit is in the second mode, the set change in the power signal comprising the power signal changing from being at the first level to being at the second level, and
• responsive to detecting the set change in the power signal over the period of time when the communication circuit is in the second mode, cause the communication circuit to transition from being in the second mode to being in the first mode;
• and
• a housing configured to support the input port, the light source, the communication circuit, and the controller.