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Super-bright LEDs in public places?
On a recent trip back to the UK I noticed - whilst travelling mostly by
rail - that at the landings of flights of steps at very many stations now there are overhead panels of super-bright blue LEDs tilted downwards towards passengers approaching the stairs. These panels are *extremely* bright and quite painful to look directly at, even in daylight. They appear to be left on day and night. Does any knowledgeable person know what function they're supposed to perform? |
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