flourescent vs standard bulbs - Tropical Fish Keeping - Aquarium fish care and resources

 
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post #1 of 3 Old 05-06-2012, 01:12 PM Thread Starter
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flourescent vs standard bulbs

i bought a 20gal and it came with a flourescent hood. i have 3 platys 4 platy fry 4 neon swordtail fry. i did not like the flourescent set up. last night after lights out , i took my hood apart and replaced light with incandescent set up. my fish look healthier, have richer color. and all the fry are now schooling together. they all seem happier and less stressed. but i am new to this so take it with a grain of salt.
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post #2 of 3 Old 05-06-2012, 02:23 PM
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You might have achieved the same thing with just a new tube. The colour temperature, called Kelvin, determines the hue that a light will cast in the aquarium. Those of us with planted tanks have looked into this thoroughly since plants will do better under certain spectrum and kelvin is associated.

The fluorescent tubes that come with most fixtures are high in the red and blue and cast a purplish hue which distorts fish colours although it usually heightens red and/or blue depending upon the spectral phosphors. Incandescent bulbs of the "old fashioned" type were always "warm" with a Kelvin below 5000K. You can now get CFL (compact fluorescent) bulbs with varying K and they use much less energy so they are more efficient, plus they give off much less heat. If you now have incandescent (screw-in) sockets you should look at CFL to save heat and money. Those with a 6500K, usually termed daylight or bright daylight, will render fish colours true as they are close to the sun.

Byron.

Byron Hosking, BMus, MA
Vancouver, BC, Canada

The aquarist is one who must learn the ways of the biologist, the chemist, and the veterinarian. [unknown source]

Something we all need to remember: The fish you've acquired was quite happy not being owned by you, minding its own business. If you’re going to take it under your wing then you’re responsible for it. Every aspect of its life is under your control, from water quality and temperature to swimming space. [Nathan Hill in PFK]
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post #3 of 3 Old 05-06-2012, 02:38 PM Thread Starter
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Originally Posted by Byron View Post
You might have achieved the same thing with just a new tube. The colour temperature, called Kelvin, determines the hue that a light will cast in the aquarium. Those of us with planted tanks have looked into this thoroughly since plants will do better under certain spectrum and kelvin is associated.

The fluorescent tubes that come with most fixtures are high in the red and blue and cast a purplish hue which distorts fish colours although it usually heightens red and/or blue depending upon the spectral phosphors. Incandescent bulbs of the "old fashioned" type were always "warm" with a Kelvin below 5000K. You can now get CFL (compact fluorescent) bulbs with varying K and they use much less energy so they are more efficient, plus they give off much less heat. If you now have incandescent (screw-in) sockets you should look at CFL to save heat and money. Those with a 6500K, usually termed daylight or bright daylight, will render fish colours true as they are close to the sun.

Byron.
thanks byron once again you've steered me in the right direction.
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