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.
Sometimes, on a 2-lamp. ballast, there will be ONLY 2 wires supplying two lamps. This kind of ballast canât be overdriven. The current flows through one wire, and then through the filament of the first lamp, then through a jumper wire to other lamp filament, then back to the ballast via the second wire.