The warm / soft white color 5mm flat top concave 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. The trait that sets this LED apart from others in a similar category is that it is a wide angle light. It has a diode within the LED that is designed for wide angle dispersion along with a "molded" concave lens that helps disperse light. The combination of these two things creates a wide angle LED that is unparalleled. This means that the light is more spread out and not so direct. This can help out a lot when trying to illuminate something in small spaces.This LED is commonly used in LED lighting strings, such as those used in Christmas lights. This light is used because it gives such a wide viewing angle!We use and have only the highest quality leds out there.