I misread a customer's email in which she wonders when Stromness town council stopped using gas from the gas works.
I had initially thought that the query regarded the change over from gas streetlights to electric.
It was surprising to discover that the street lights were gas until as late as 1947. This means that post WW2, the council was still employing lamp-lighters and lamp-extinguishers. Apparently, the lamps were left unlit on nights when there was a full moon.
Information from Stromness Town Council minutes reference S1/7 and History of Stromness by George S. Robertson.