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 this section, we introduce instructions to replace a fluorescent tube with an ETL approved LED tube light in an inductive-ballast-based fixture. Warning. 1  The replacement must be done by a professional electrician. 2  Risk of fire-Users must determine wether the LED tube light is suitable for the fixture or not. Put on safety goggles and gloves for protection purpose. 2  Make sure the fluorescent tube you are going to replace works in an inductive-ballast-based fixture. 3  A simple method to identify the type of ballast is to check if there is a starter in the wiring of the fixture.