Alex Mustard / 2020VISION / Light-bulb sea squirts (Clavelina lepadiformis), a colonial filter feeding invertebrate, fluoresce orange when photographed under deep blue light. Shetland Islands, Scotland, UK, June. Did you know? L...

Alex Mustard / 2020VISION / Pair of Skeleton shrimps (Caprella linearis) male on left, living on lightbulb tunicates. Bard Cave, Bressay, Shetland Islands, Scotland, UK, June

Philippe Clement / Wind farm turbine against cloudy sky seen inside incandescent lamp / bulb against black background Digital composite

Philippe Clement / Sunflowers (Helianthus annuus) inside incandescent lamp / bulb against white background Digital composite

Philippe Clement / Lightning during thunderstorm above petrochemical industry inside incandescent lamp / bulb against black background. Digital composite

Sue Daly / Lightbulb seasquirts / tunicates (Clavelina lepadiformis) cluster on rock, Channel Isles, UK, July

SCOTLAND: The Big Picture / Curled octopus (Eledone cirrhosa) amongst a mearl bed, with Lightbulb tunicates (Clavelina lepadiformis) Shetland, Scotland, UK, August.

Staffan Widstrand / Wild Wonders of China / Striated swallow (Cecropis striolata) breeding on top of a modern lightbulb, Tangjiahe National Nature Reserve, Qingchuan County, Sichuan province, China

Sue Daly / Lightbulb sea squirt (Clavelina lepadiformis) Trondheimsfjord, Norway, July.

Tom Gilks / Water filled bottle fixed into a tin roof, dispersing sunlight and acting as a natural lightbulb. Kenya. April 2013.

Jeff Rotman / Cannabis plants growing under artificial light, in organic Marijuana farm, Pueblo, Colorado, USA, June 2015. . Marijuana has been legalized in the state of Colorado, and this farm produces Marijuana...

Staffan Widstrand / Wild Wonders of China / Striated swallow (Cecropis striolata) nest on top of a modern lightbulb, Tangjiahe National Nature Reserve, Sichuan province, China. April.