The red color 2mm tower LED is a vibrant color that you cant go wrong with. This size led is commonly used in many custom projects, car lighting, models, and nearly every other project you can think of. They are also used for custom projects or in mass production products as well. This is a extremely popular size.This size and type of led is so popular because it is bright, easy to use, small, and versatile. It can fit in most all spaces.We use and have only the highest quality leds out there.