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Strange phenomenon with an exit sign during a power outage I've noticed that the charging LED indicator of this exit sign, continue to light when there is a power outage in my hostel. How this is happening?

Strange phenomenon with an exit sign during a power outage

I've noticed that the charging LED indicator of this exit sign, continue to light when there is a power outage in my hostel.
How this is happening?

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File information
Filename:IMG_9680.JPG
Album name:dor123 / Lighting fixtures
Filesize:1052 KiB
Date added:24 Mar, 2025
Dimensions:2048 x 1536 pixels
Displayed:402 times
URL:http://80.229.24.59:9232/gallery/displayimage.php?pid=22723
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