4G technologies are designed to provide IP-based voice, data and multimedia streaming at speeds of at least 100 Mbit per second and up to as fast as 1 GBit per second. 4G LTE is one of several competing 4G standards along with Ultra Mobile Broadband (UMB) and WiMax (IEEE 802.16).
An electrical ballast is a device placed in line with the load to limit the amount of current in an electrical circuit. It may be a fixed or variable resistor.
There are two wires that connect to the electrical source... black and white. Black goes to the hot wire of your service and the white goes to the neutral wire. Since modern wiring conforms to this color scheme, the ballast connection is normally black-black and white-white.