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.
In a flourescent fixture, the black and white wires will tie into the feed to a ballast, which will be smaller stranded wires that go to a black metal box with a label on it (the ballast). One wire from that ballast will go to each end of the lamp holders.