Signal lights typically come in red, green, yellow, or blue colors. Each color can have a different meaning. For example, a red signal light can indicate a warning or danger condition, while a green signal light can indicate that a process or function is operating.

Signal lights are available in different voltage ratings and power consumption levels. These lights are typically designed as LED or incandescent bulbs.

Signal lights are used in many different applications, including automation systems, control panels, traffic lights, industrial machines, and more. These lights are widely used in many industrial and commercial applications.