Do all bulbs with the 6500k rating make your tanks look green?
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Do all bulbs with the 6500k rating make your tanks look green?

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Do all bulbs with the 6500k rating make your tanks look green?
Old 03-10-2012, 02:23 PM   #1
 
Do all bulbs with the 6500k rating make your tanks look green?

Or is just me? I actually bought a dual fixture T5 high output setup for my tank, and took it off because it gave the tank a greenish yellowish look. I just bought a Life Glo2 20 w 6500k bulb, threw that in my original fixture I had, and it has the same look to it? I have the stock bulb that came with my hood that's 8000k and it has such a nicer look, not nearly as green looking. Do I just have to sacrifice the lighting look and stick with the green toned bulbs for the plants? Any other options?
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Old 03-10-2012, 02:59 PM   #2
 
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6500k bulbs give out a bluish-white light, not green.

8000k should be even bluer though, since the lower colors (4500k and lower) are yellow-orangeish white.

Is it possible you have tannins in your water?(since blue +yellow = green)
Or a mild case of 'green water' algae?
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Old 03-10-2012, 03:01 PM   #3
 
Quote:
Originally Posted by redchigh View Post
6500k bulbs give out a bluish-white light, not green.

8000k should be even bluer though, since the lower colors (4500k and lower) are yellow-orangeish white.

Is it possible you have tannins in your water?(since blue +yellow = green)
Or a mild case of 'green water' algae?
I seem to only notice it with the 6500k bulbs? I don't have any driftwood or anything in my tank to produce tannins. I'm going to be doing a big water change tonight since I'm long over due for the week, and I'll see what I can come up with.
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Old 03-10-2012, 03:11 PM   #4
 
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Alrighty, let us know. If you have a lot of plants, they could be reflecting green light, and it could be more noticeable with 6500k....
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Old 03-10-2012, 03:19 PM   #5
 
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If the 8000K is a 'plant' bulb then yes, the 6500K will almost certainly have more green, I know the Life Glo emits a good amount of green. The difference at first will seem quite drastic, but you will get used to it over time.
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Old 03-10-2012, 04:02 PM   #6
 
All 6500K bulbs look green to me too. I use 8000K on my show tanks. My favorite bulbs are GEs Salt and freshwater 9325K bulbs.
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Old 03-10-2012, 04:04 PM   #7
 
I have a fair amount of plants, 1 amazon sword, 1 anubias, a few vals, ancharis and hornwort.

One more question, is there really that much of a difference between the 8000k 17 watt bulb that came with my hood, and the 20 watt 6500k Life Glo bulb?
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Old 03-10-2012, 04:19 PM   #8
 
as far as plant growing goes no. It depends on the color spectrum more then the kelvin temp. The GE bulbs I recommened above are really good for plants.
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Old 03-10-2012, 04:20 PM   #9
 
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It's not just you. I've always found lamps in the 6500 range to be greenish-yellow as well. A lot of people seem to like that type of color. I don't.

I have one small tank that I'm currently using an Aqua-Glo in. The Aqua-Glo is rated at 18,000K. It produces a very subdued bluish violet color that I personally prefer.

Different strokes.

As far as plants, I'm having good results with the Aqua-Glo in the small aquarium. I've tried one in a deeper tank with less favorable results. Sometimes you just don't know until you try. But eventually you do build up a nice collection of tubes.
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Old 03-10-2012, 06:01 PM   #10
 
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I have the same problem. For me, its a combination of two 6500K bulbs and blackwater that make my tank look lime green.

Does anyone know of a bulb that will grow plants nicely, but has more yellow/red looking light?
I have "Jungle Val" and a double bulb fixture. I can't afford to blow any more money on bulbs that won't give me the look I want AND be enough to grow my Vals. Is having enough light to grow the Vals AND have blackwater that actually looks like blackwater... is it just a dream?!
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