Meet the Sengled Boost Dimmable LED Bulb: a smart light bulb that also extends your WiFi signal coverage. It supports client and access point modes. The device has two built-in antennas to offer you a max data exchange rate of maximum 300Mbps. It works with smartphones, tablets, and computers. There is also an iOS/Android app to help you configure your light.
This smart light bulb has a range of over 100 feet. You will be able to control individual or a group of lights from your phone. Sets you back under $50 at this time.