LIGHTING  IN THE MARINE AQUARIUM
  and for the Photographer                         by Andy Horton



There are several types of lighting that can be used to illuminate the marine aquarium.  They should be purchased from a special aquarium retailer:

Flourescent.
Flourescent Blue Lights.

Metal Halides  (for large invertebrate aquaria)
Mercury Vapour  (for large invertebrate aquaria)

For the smaller fish-only marine aquarium I suggest the combination of a clear daylight flourescent  strip, plus a blue one.

However, tropical marine invertebrate aquaria, and temperate aquaria with anemones containing symbiotic algae, require special high intensity lighting.


 INTENSITY OF LIGHT

 Readings taken with a light meter on the ground (average grey).
 

 EXPOSURE VALUE  LUX READING  CAMERA SHUTTER SPEED 
  FILM ASA 100   APERTURE f.16
 15   Bright Sunlight, Mediterranean, 
        California, Tropical
 175000   1/125th second
 14   Weak Sun, Tropical    88000    1/60th second
 13   Sunny Day, Britain    44000    1/30th second
 12   Cloudy Day    22000    1/15th second
 11  Tropical Invertebrate Aquarium
        with Corals (minimum)
   11000    1/8th second
 10  Anemones without zooxanthellae      5500    1/4  second
  9   Deeper living Invertebrates      2800    1/2  second
  8   Tropical Marine Fish      1400    1 second
  7  Light suitable for reading        700    2 seconds
  6  Interior of Building (brightly lit)        350    3 seconds
  5  Domestic Interior (average)        175    4 seconds
  4          88    8 seconds
  3          44   16 seconds
  2          22   30 seconds
  1          11     1 minute

Snakelocks Anemone (Link)


COLOUR TEMPERATURE (COLOUR SPECTRUM)

Natural daylight has a colour temperature of about 5500 Kelvin. The higher the Kelvin, the bluer the light. Ordinary flourescent bulbs are likely to have a colour temperature of about 3000 K and impart an orange tinge which is aesthetically undesirable. Choose strips with colour temperature of 6500 K designed as natural daylight lamps and/or flourescent strips imparting a strong blue light at a colour temperature of 10000 K.



Photography in the Aquarium (Link)

Nature Photography (including LUX readings conversion)
 
 

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