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Sunday, August 24th, 2014
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Coral in Ultraviolet

The blue LEDs in my aquarium lighting system emit a considerable amount of ultraviolet. Some of the corals fluoresce in response.

The reason the system has blue LEDs is as an attempt to simulate a moonlight cycle (daylight, moonlight, and darkness are controlled by timers), which, in the wild at least, encourages the corals to reproduce. At night, the low light of the moon, combined with seawater's tendency to filter to green and blue, led to the idea of blue LEDs serving in this role. Does it work? I think that's a little bit debatable at this point, but it clearly doesn't hurt, and so... 😊

#aquarium

EXIF:

Width: 1743
Height: 1162
Company:  Canon
Camera:  Canon EOS 6D
Shot On:  2014:08:24 12:37:55
Lens Model:  EF85mm ƒ/1.8 USM
Aperture:  ƒ/22.0
Focal Length:  85.0mm
Metering Mode:  Pattern
Exposure Mode:  Auto
Flash:  Did Not Fire
Exposure Time:  20.0 seconds
Exposure Program:  Aperture Priority
ISO:  100

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