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Old 01-25-2011, 05:29 PM   #1
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Actinic Light Effect?

would it be possible for me to just tint the lens on my fixture blue to get the effect of actinic lights.

the bulbs here seem to be more expensive then the 10000k
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Old 01-25-2011, 05:37 PM   #2
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Just buy the bulbs online
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Old 01-25-2011, 06:02 PM   #3
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No you cant tint the color to make it actinic. It`s what`s in the bulb that makes it actinic.

This might help

Aquarium Lighting: Choosing the Proper Lighting For Your Aquarium
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Old 01-25-2011, 07:00 PM   #4
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ok so do i "need" actinic for corals to grow?

i always thought it was for the color effect
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Old 01-25-2011, 08:15 PM   #5
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most of the bulbs we use in the hobby are full spectrum lamps. the 10k you have has some blue light in it, as well as red.
what i am saying is you don't need actinic supplement. people want it for aesthetics mostly.

what kind of lamp are you looking for? i have some misc. used halide bulbs laying around.
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Old 01-25-2011, 08:20 PM   #6
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I personally think you need the actinic lighting but as Doug said it`s in the actinic white or 50/50 bulbs already. I run two super actinic and two 50/50 bulbs on my tank.
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Old 01-25-2011, 08:44 PM   #7
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its a 4 foot t5 light.

the bulbs are 46" i think

but if the blue light that is given off is only for aesthetics reasons, why cant i just tint the light cover blue?
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Old 01-25-2011, 08:55 PM   #8
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Because it won't give you the effect you're looking for.

"Daylight" bulbs (including the 10000k) have a wide spectrum (wavelength) of light coming out of them. Some of this light includes the light in the 420-460 nm range... which is the normal "actinic" range.

An "Actinic" bulb focuses pretty much all of its light in that 420-460 nm range. You are getting way more energy in that actinic range with a pure actinic bulb than you are with a daylight bulb. This extra energy (I know... it's probably the wrong scientific verbage, but bear with me) is what makes the corals "pop", or fluoresce.

Your daylight bulbs are indeed giving off light in the actinic range, but just not enough to really make the corals fluoresce. Putting a filter on the light is going to turn the light blue, but it's not going to increase the amount of energy coming out of the bulb. And that's what you need to make the corals pop.

As far as if the corals truly need that extra actinic spectrum, I think that's still a pretty hot topic for debate. I'm not up on the arguments, but I thought the argument for actinic was that as you go into the water in the ocean, the actinic spectrum is what penetrates more. So in order to recreate the spectrum of light the corals see in their natural setting, actinic supplementation is done.
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Old 01-25-2011, 09:00 PM   #9
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Quote:
Originally Posted by Kurt_Nelson View Post
As far as if the corals truly need that extra actinic spectrum, I think that's still a pretty hot topic for debate. I'm not up on the arguments, but I thought the argument for actinic was that as you go into the water in the ocean, the actinic spectrum is what penetrates more. So in order to recreate the spectrum of light the corals see in their natural setting, actinic supplementation is done.
My thought exactly. The blue part of the spectrum is what makes it to the deeper parts of the reef.
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Old 01-25-2011, 09:06 PM   #10
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the term "fluoresce" means the emission of light by a substance that has absorbed light or other electromagnetic radiation of a different wavelength.
it's just what YOU see, not what the corals see. it's all about looks. enough PAR and it doesn't matter if the corals fluoresce, they still do very well. the trouble is, they don't appear bright and colorful.
many folks including myself have used metal halide lamps with no actinic supplement, and corals grow fine.
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