Question about kelvin ratings - Tropical Fish Keeping - Aquarium fish care and resources
 
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post #1 of 3 Old 01-17-2007, 01:31 PM Thread Starter
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Question about kelvin ratings

Why do we need actinic lighting when full spectrum bulbs have the entire spectrum?
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post #2 of 3 Old 01-17-2007, 02:06 PM
What is a full spectrum bulb? Sounds like a marketing ploy to me. No seriously I've heard of full spectrum bulbs but if marine keeping where only that simple. Most people use high intensity lighting at 10-12K for coral growth. When doing so you need to balance out the yellow light. The blue lighting will help bring back the washed out colors. Also full actinic NM420 can help certain algaes with their photosynthesis, without this your corals will starve and die. A "full spectrum" bulb is only good in fish only set ups to help bring out the colors in your fish.
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post #3 of 3 Old 01-17-2007, 02:49 PM Thread Starter
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Sorry, I'm dumb to this. I thought corals needed the BLUE (actinic) light for growth and that the WHITE (10k) was only needed to balance out the blue so everything didn't look blue (I think I read that in this forum somewhere).

Can you go over what spectrum is what color and is for what growth? Thanks Mike!
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