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.
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jonbob loves you, Sat 14 Apr 2018, 1:42,
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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!)
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tarka_dall Like normal dall, only a bit more spicy, Sat 14 Apr 2018, 7:18,
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