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This is a normal post That's them.
I'd always though they were crude things with filament bulbs in them. Now I see they're crude things with fluorescent bulbs in them.
(, Sat 14 Apr 2018, 1:42, Reply)
This is a normal post It's a neon bulb which is a gas discharge lamp
Fluorescent lamps generate the final light with a phosphor that converts one wavelength into another.
(apologies for the pedantry!)
(, Sat 14 Apr 2018, 7:18, Reply)