- The jewel of the site is the catoptric light with its brass and steel clockwork to turn it.
- Ambrose, built in 1952-53, is the only lightship equipped with a modern catoptric type lens.
- Prior to that the single catoptric fixed white light was powered by three burners.
Mid 16th century (as a noun in the sense 'the part of optics that deals with reflection'): from Greek katoptrikos 'reflecting', from katoptron 'mirror'.
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