Wikipedia
LIFX
LIFX (pronounced Life-X) is a line of energy-efficient, multi-color, Wi-Fi enabled LED light bulbs that can be controlled via a Wi-Fi equipped device such as a smartphone or smartwatch. LIFX bulbs are equipped with a Wi-Fi microcontroller that uses master/slave concept. The master light bulb connects to the router via 802.11a/ 802.11g/ 802.11n and then to all the other LIFX bulbs in the house via a low power IPv6 802.15.4 mesh network.