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.
Check the label on the ballast in your fixture to see what type it is, and what type of lamps it is intended for.2. That Annoying Buzz:All electromagnetic ballasts gener-ate hum. Look for the âsound rat-ingâ of A through F on the ballastâs label.