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Light for my 55 Gallon Planted Aquarium

This is a discussion on Light for my 55 Gallon Planted Aquarium within the Beginner Planted Aquarium forums, part of the Beginner Freshwater Aquarium category; --> Okay... Just get the cheaper 6500 bulbs rather than expensive pet store bulbs... Just look at the 6500k ones, and pick out the two ...

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Light for my 55 Gallon Planted Aquarium
Old 11-16-2012, 11:42 AM   #11
 
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Okay... Just get the cheaper 6500 bulbs rather than expensive pet store bulbs...

Just look at the 6500k ones, and pick out the two brands with the highest CRI.. (I like mixing brands, they might have a fuller spectrum.)
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Old 11-16-2012, 11:45 AM   #12
 
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Originally Posted by redchigh View Post
Okay... Just get the cheaper 6500 bulbs rather than expensive pet store bulbs...

Just look at the 6500k ones, and pick out the two brands with the highest CRI.. (I like mixing brands, they might have a fuller spectrum.)
CRI? When I originally bought the shop light, I bought 2 T8 bulbs with it. I will check those out when I get home. Yeah I figured I would not purchase those lights at the pet store, such a difference in price, its almost sad.
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Old 11-16-2012, 11:58 AM   #13
 
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A

Don't worry about the cri if you already bought the lights.
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Old 11-16-2012, 12:12 PM   #14
 
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If you have the dual T8 fixture that takes 48-inch tubes, just buy a couple of new tubes if you're uncertain about the ones you have. There should be some printing on one end of the tube, see if it mentions Kelvin [a 4 digit number with suffix K]. A tube around 6500K works best all round. These tubes are not expensive, GE, Phillips and Sylvania make them. Home Depot, Lowe's, etc carry one of these brands. I have used all three, and though it is not really much of a difference, I seem to prefer the GE, but I can't really say why. I'm now using mixes. They are all about the same price, usually in a pack of 2 tubes.

On the LED, if you already have the fixtures, they may or may not work fine. I too don't know anything about LED having never tried it. But I do know that there are now available some very good planted tank lights in LED. You just have to know what you're getting. The November issue of PFK mentioned some I think. But yes, they are much more expensive. Long-term the cost for electricity is much less of course, so eventually it might even out.

But a dual T8 with "daylight" tubes around 6500K will be fine.

Byron.
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Old 11-16-2012, 01:14 PM   #15
 
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Originally Posted by redchigh View Post
Don't worry about the cri if you already bought the lights.
Well I may have to go get new bulbs, so what is CRI? Ha

As for the 48" fixture, I will be installing that tonight. And I think I may just add those LEDs to 125, since it is not planted, or barely plants (2 Anubias inthere at the moment).
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Old 11-16-2012, 03:43 PM   #16
 
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Well I may have to go get new bulbs, so what is CRI? Ha

As for the 48" fixture, I will be installing that tonight. And I think I may just add those LEDs to 125, since it is not planted, or barely plants (2 Anubias inthere at the moment).
CRI is a measure of how accurate, or true, the light is to the rating. So a CRI of say 80 means it's 80% correct. The higher the number, the more 'true' it is to its color temperature. Both CFLs and LEDs can only approximate the 'true' color.
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Old 11-16-2012, 04:00 PM   #17
 
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CRI is a measure of how accurate, or true, the light is to the rating. So a CRI of say 80 means it's 80% correct. The higher the number, the more 'true' it is to its color temperature. Both CFLs and LEDs can only approximate the 'true' color.
Gotchya, makes sense. Now could you hop on over to my other thread regarding water changes and planted tanks, haha, thanks though. Seriously, though, all of yall have been a big help with this.
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