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.
What are Ballasts? If you have been doing any sort of research on purchasing an HID conversion you will inevitably come across the term ballast. What ballasts do in a conversion kit is relatively simple. The wiring harness that your car uses to power the stock halogen bulbs usually run at 55w. When you upgrade to an HID conversion, the bulbs that are used only require 35w (as a general rule of course).