Filament (Day 1325)

Apparently, today was the "shortest day", meaning that we had a little over six hours of daylight today. I didn't get to see much of the daylight whilst I got on with the bathroom fit, though from brief forays out to the van suggested that it has been a rather fine day.
I finished the bathroom off and loaded the van up by the light from the street lights. 
Returning home for an evening with my beautiful wife blipless, I had a lightbulb moment.