Quote:
Originally Posted by Heatercathodeshort
What was the reason for the 'pink' coloured glass support spider in certain low wattage lamps typically 15 and 25W? Always a mystery to me. John.
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There was a historic code for the coloured-blobs on the supports for low-powered filament bulbs; this was associated with the US convention to identify bulbs as '#47' and the like.
If anyone's interested, I can post the colour-blob-to-specification tables from a couple of WWII-era US documents.