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Panel Indicators, Pilot Lights

A panel indicator is an electrical device that gives a visual indication of a power, signal, or function being activated, or of an idle status.

A pilot light, also known as a tell tale, is a small electric light that is usually illuminated when a switch is turned on or a power or signal is present.

The purpose of such devices is to alert the user as to the status of the equipment, or to make it easier to locate a switch.

Panel indicators and pilot lights come in many shapes, sizes, colors, and voltages. They can be used for a variety of functions such as indicating an alarm condition, a low battery level, or the presence of power or a signal.

The most common type of panel indicator or pilot light is the light-emitting diode (LED). LEDs are favoured over other types of indicators because they are space-saving, energy-efficient, long lasting, and provide bright, reliable lighting with no heat generation.

LEDs are commonly used in control panels, audio and video equipment, instrumentation, and other devices where visual indication of a power or signal is required. LEDs are available in various sizes and colors, and many are designed to be visible even in bright sunlight.

Panel indicators and pilot lights are also available in other forms such as neon lamps, incandescent lamps, and light-emitting capacitive (LEC) panels. Each type has its advantages and disadvantages, and the choice of technology depends on the requirements of the application.

For example, neon lamps are very bright in visible light and can easily be seen in bright environments. However, their relatively high power consumption and shorter lifespan makes them less suitable for applications where power consumption or operating life is a concern.

Incandescent lamps provide a softer, diffused light and can draw more power than LEDs. They are suitable for applications in which a more subtle indication is desired such as lighting in theaters or warning lights on public transportation.

LEC panels are becoming increasingly popular in control panels and other devices. They are very energy efficient and have a long lifespan. They also provide a bright, visible indication, and are available in a range of colors.

Panel indicators and pilot lights can be used in a variety of applications, from industrial controls to consumer electronics. They are a simple and effective way of providing a visual indication of a power, signal, or function being activated, or an idle status.

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