Local Area Network; is a network that allows multiple computers or other devices to be connected to each other. In order to share data or a resource or file storage space.

Light Emitting Diode, a semiconductor used to convert information from electrical to optical form, typically as an indicator light.

A lens is a device, usually made up by a piece of shaped glass. It is used to concentrating or diverging light.

An open source operating system based on UNIX. It is popular in web server and other high-performance computing environments, and has recently begun to gain popularity in workstation environments as well.

A measure of visible light intensity taken at the surface that the light source is illuminating. (1 lux = 1 lumen/square meter).