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A modeling lamp, also known as a pilot light, is a light that illuminates when an electrical circuit is fed. It is used in various settings, including railway signaling and electronic devices, to indicate power or problems. Installing a modeling lamp is simple, and durable bulbs or LEDs are used to prevent unsafe conditions.
A modeling lamp is a light that illuminates under specific conditions, most commonly when an electrical circuit is fed. It may also be known as a pilot light or pilot light, although this should not be confused with a small flame that continues to burn in a gas appliance to provide an ignition source when the appliance is on. Pilot lights are used in a wide variety of settings and in some cases are required by law for safety reasons.
An example of a warning lamp is a light used in railway signalling. Railway signaling is complex and problems with the system could pose a significant risk. Many systems have lights that activate when there are shorts or other electrical faults, alerting train engineers that a track could be dangerous because the signaling system is out of order. Pilot lights can also be used to provide signals to platform controllers, activating when a train is passing and completing an electrical circuit so operators know when trains are on the tracks.
The pilot light can also be used on a variety of other circuit types, including very small electrical circuits. Many electronic devices use a pilot light to indicate when the system has power or when a problem occurs. The lighting behind the “power” button on many electronic devices is a simple example; when there is a light, people know the circuit is live. Similarly, many systems use an orange or red backlight for the power button when the system powers on or off, or when a problem occurs.
Installing a modeling lamp is usually very simple, especially when it only needs to provide basic functionality such as turning on when an electrical circuit is energized. The lamp can be wired into the circuit so that it lights up when power moves through the circuit. When the power is cut off, it will shut down, as it will have no power source. Lights designed to operate in the presence of malfunctions and other problems are a little more complicated, especially if they are also designed to click to shut off the circuit until the problem is resolved.
A variety of bulbs are used for modeling lamps. Highly durable bulbs with a long life are usually used, and more and more people are relying on light-emitting diodes (LEDs) for their brightness and longevity. The goal is to prevent a situation where the lamp fails and an unsafe condition is present with no indicator.
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