THE FUSE

Because they're filled with delicate glass, you do need to be careful about kinking fiber optic cables. Some DIY kits come with very thin, extremely flexible fiber that will bend around a tight corner or fit under a door, while others come with cables that are thicker and less flexible. Be sure to pay attention to minimum bend radius when picking out a solution, which tells you how tight a corner a cable can handle. A standard bend-insensitive cable might have a minimum bend radius of 10mm, while more specialized cables could turn 90 degrees in just 2.5mm.