On 14/01/2019 11:21, GB wrote:
On 14/01/2019 09:33, Robin wrote:

I thought hairpin style filaments weren't coiled - hence the tubular
design (up to at least 8 inches long IIRC) to make them long enough.

If you zoom in on the photo, you can see that this filament is coiled
quite loosely.

My terminological failu I grew up with "coiled" as shorthand for
coiled-coil, never having met a lamp that was a _single_ straight wire.
Indeed, ones like Daniele's which clearly has the filament passing up
and down were sometimes called "straight wire".





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Robin
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