Bulb Size and Bases. C7 bulbs are smaller than C9 bulbs by 1 inch. C7 bulbs are 2 inches long and C9 bulbs are 3 inches long. C7 bulbs sit in a base known as a candelabra base and can only fit in this specific type of base. C9 bulbs sit in a base known as an intermediate base.
Indoor cable. Indoor fiber optic cable normally includes tight buffer type, distribution cable, breakout cable and armored cable etc. Cable's job is to protect the fibers from the environment encountered in an installation.
Tevelec provides the highest quality and the full spectrum of Fiber Optic Cable types. There are three basic kinds of fiber optic cables: 1  Plastic fiber, of which the most common is for high-end audio and is called Toslink.  Then we have Multimode fiber. This is made of glass and can come in various diameters.