"Twinkle twinkle, in the night, saving souls, with your light..."

This is the prism lens from a lighthouse that was decommissioned in NZ many a year ago. This is on display in the Arc display on Queen's Wharf in Wellington. I had all the guff written down, but lost the bit of paper. :( Ah well, if you do a Google for "Wellington Arc" you'll probably find out all about it... I can't be bothered right now.

Done