ZigBee is a software standard used for automation. I am able to incorporate ZigBee features in any home or facility programming I write for you. It can control lighting on/off color/intensity and strobe. With the protocol I can create even dependent on weather, temperature and humidity. ZigBee is also capable of networking with other systems for voice recognition, object interpretation through camera systems and blast detection.
Sonoff is a hardware manufacturer that builds microprocessors into a variety of devices that are ZigBee compliant. Light bulbs, switches, sensors, cameras all are manufactured with Sonoff hardware to give ordinary electronic devices compatibility with large scale automation projects.