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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?

Screenshot_20210227-155724.jpg Screenshot_20240217_141444_Gallery.jpg Screenshot_20240222_115245_Gallery.jpg MVI_8446_MP4_snapshot_00_02_805.jpg IMG_9368.JPG
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:143 times
URL:http://80.229.24.59:9232/gallery/displayimage.php?pid=22723
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