The power in the hallway just went out. I had to press the button to turn it back on, but it still glows red (maybe it's always been like this). But when I turn off the power in the hallway, the red light no longer glows.
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Are you talking about the light in the hallway??
This is a relay that can, for example, switch on the light in the hallway. If the LED is lit , the output is switched on, and the lamps receive power and light up.
This is a normal power indicator that simply shows ON or OFF.
Yes, light and socket in the hallway. Thanks.