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Lighting question

This is a discussion on Lighting question within the Beginner Planted Aquarium forums, part of the Beginner Freshwater Aquarium category; --> Originally Posted by RSully Thoughts? To much or would it be ok? Marineland Aquatic Plant LED Light System - 24 to 36 in. | ...

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Old 12-23-2012, 09:49 AM   #11
 
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Like Quantum, I have insufficient experience with LED, but I will say that there are LED fixtures available today which are fine over planted tanks. You have to know what you are getting, and they are initially much more expensive, but long-term savings are significant.

Having said that, the blurb at the linked site says this fixture is equivalent to T5 HO. If this is true, this might work well.

T5 HO is more intense (brighter) light than regular T8 or T5 NO when comparing the same type and size tubes. So that being said, a 24-inch T5 HO might work, similar to a 36-inch T8. And if that is true, then likely the linked fixture would work.

If this were me, I would want to buy this from a local store so I could take it back; not knowing what I'm getting, I would want to try it over the tank. I did this with the T5 HO, for a week, and returned it for a T8 because the T5 was far too much light.

On the length issue, I don't have problems with tubes shorter than the tank length, depending upon their intensity. Over my 5-foot 115g I have two 4-foot T8 tubes and this is fine. And with the above, we are talking much brighter light to begin with, so this might not be an issue. But again, this is surmise, since I do not know this fixture.

Byron.
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Old 12-26-2012, 02:14 PM   #12
 
I recently got the MarineLand 55 set and it came with the LED light bars. They are a very bright light and it doesn't quite go all the way to the ends of my tank (May be different on yours). But overall I think i'm starting to like the look of it. (The Incandescent type of lighting seems more natural to me though) Also, Unless your planting stuff right up against the edge of the tank the shadow areas shouldn't matter IMO.
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Old 12-27-2012, 07:23 PM   #13
 
OK, I starting to lean this way. ANy thoughts? I went to upgrade my single t8 bulb to day and realized I was only going from 25w to 30w and for a 33.00 bulb, that didn;t seem worth it. The link below seems like it would be a good all around light.

Aqualight with Colormax & 6700K T5 Fluorescent Lamps - 30 in | ThatPetPlace.com

It;s the 30" and the next size is 48".. Why they wouldnt have a 436" is beyond me.
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Old 12-27-2012, 07:36 PM   #14
 
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It;s the 30" and the next size is 48".. Why they wouldnt have a 436" is beyond me.
I noticed that too. What I would do is get the 36" saltwater version and since I would be replacing the colormax bulb anyway, switch out the actinic bulb with the 6700K one and run it along side the 10000K.
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Old 12-27-2012, 07:49 PM   #15
 
What would be the reasoning for switching out the colormax bulb? Preferance or performance. And didn;t someone mention earlier that 10k was too high? Sorry for all the questions, just don;t want to make a bad purchase and have to do this again like I have with my SW set-up.

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I noticed that too. What I would do is get the 36" saltwater version and since I would be replacing the colormax bulb anyway, switch out the actinic bulb with the 6700K one and run it along side the 10000K.
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Old 12-27-2012, 08:15 PM   #16
 
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The switch from a single T8 tube (whether 30 or 36 inches) to a dual T5 is enormous; most T5 are HO tubes, which means two will be roughly equivalent to 4 T8's of the same type (spectrum). A single T5 would be good, or then a dual T8. If you can get NO T5 tubes, that would work in a dual. Or LED (of which I know next to nothing, except that there are now some very good units available if you know what you're getting).
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Old 12-27-2012, 08:22 PM   #17
 
Byron, did you look at the link I put up a few posts ago? Those are not HO t5's just standard. So I'd be going from a single 25w t-8 to two 18w t-5's. To big a jump? And my only concern with that set-up is being 6 inches short on lenght but maybe that's not to big of an issue?

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The switch from a single T8 tube (whether 30 or 36 inches) to a dual T5 is enormous; most T5 are HO tubes, which means two will be roughly equivalent to 4 T8's of the same type (spectrum). A single T5 would be good, or then a dual T8. If you can get NO T5 tubes, that would work in a dual. Or LED (of which I know next to nothing, except that there are now some very good units available if you know what you're getting).
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Old 12-27-2012, 08:27 PM   #18
 
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yeah, these are not High Output, so not too much for this tall tank

Quote:
What would be the reasoning for switching out the colormax bulb? Preferance or performance. And didn;t someone mention earlier that 10k was too high? Sorry for all the questions, just don;t want to make a bad purchase and have to do this again like I have with my SW set-up
largely personal preference, the colormax will give the tank a pinkish hue that I used to not mind so much, but I now prefer more natural light (I have the 24" dual bulb and the 30" single bulb version of that light and use the Aqueon/Coralife 6700K bulbs for each bulb location)

the idea (which I used to believe) with the pink lights is that chlorophyll absorbs red and blue light to drive photosynthesis (which is true) so more of it will produce better plant growth (which is debatable), I tried to find evidence showing the pink bulbs led to better growth and really couldn't find any, however I did find studies from scientific journals (and have linked to them iin other posts) suggesting that a more balanced light is better

both of these issues will be somewhat mitigated by having the colormax alongside a 6700K bulb, so if you don't mind the look and get good plant growth, no real need to change it, same with the 10000K, it will have a 'cooler' look due to relatively more blue light, but still more natural and better balanced than the pink bulb, and preferable to the pink bulb in my opinion
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Old 12-28-2012, 02:14 PM   #19
 
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Byron, did you look at the link I put up a few posts ago? Those are not HO t5's just standard. So I'd be going from a single 25w t-8 to two 18w t-5's. To big a jump? And my only concern with that set-up is being 6 inches short on lenght but maybe that's not to big of an issue?
That's fine. T5 NO is roughly the same as T8 [in identical spectrum, etc]. I always caution on T5 because I cannot get NO tubes anywhere, only HO.
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Old 12-28-2012, 08:57 PM   #20
 
I ended up after a long search today finding a dual t-5 normal output with 67k daylight and color max bulb. I may change out the colormax later on for the flourogro but for now, we like it. Set it up and man what a differnace from a visual persoective. ALmost like night and day. Hopefully the plants will feel the same way.
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