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Old 11-26-2014, 10:58 PM   #31
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This might not pertain to your tank because it's so deep, but I'm to cheap to spend that much on lighting and I just use t8 48" shop lights ( I know t8s are outdated but they work for me) my whole light setup only costed 60$. I'm also not trying to grow high light plants but I think it's working ok. Don't shoot me for using wpg but It gives me a little over 2wpg on my 55 gallon tank.


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Old 11-26-2014, 11:14 PM   #32
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This might not pertain to your tank because it's so deep, but I'm to cheap to spend that much on lighting and I just use t8 48" shop lights ( I know t8s are outdated but they work for me) my whole light setup only costed 60$. I'm also not trying to grow high light plants but I think it's working ok. Don't shoot me for using wpg but It gives me a little over 2wpg on my 55 gallon tank.


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Old 11-27-2014, 09:24 AM   #33
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I think so. I've turned most of my blues off on the ex-reef lights and just using daylights and reds on planted DT. I then have a hydroponics led that is largely red light as well.

It's a nasty shock getting used to the red light though. As well as the box LEDs I have a strip led at the tank front just to even out the light/shadows from the box LEDs.

I've only briefly looked at this but the strip led lights I could get in Australia say their blue lights are suitable for planted FW or SW. For the planted I would then buy a second strip led light full of reds. I always wondered if this was correct that planted FW and SW use the same spectrum in the blue light side??

---------

http://3.bp.blogspot.com/_cwbt2D65i9...hlorophyll.jpg

As shown above, plants need the majority of the light to be around 400-450nm and 650-675nm (or blue and red light). The blue light is used for leaf growth, and promotes bushy, compact growth, while red light is mainly used for flowering and strong stems. They reflect most green light, thus explaining why leaves are green.

Aquatic Eden: Understanding Full Spectrum Aquarium Lighting
Pertaining to land plants, but I think we can use this info this application as well-
"Red and blue have the greatest impact on plant growth. Green light is least effective (the reflection of green light gives the green color to plants). Blue light is primarily responsible for vegetative leaf growth. Red light, when combined with blue light, encourages flowering."

Plant Growth Factors: Light
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Old 11-27-2014, 01:19 PM   #34
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A few things to consider are the actual wavelengths produced by the lights you are using, not their colour appearance. Same thing when comparing lamps of the same K value. As well, the CRI which will influence the actual appearance of everything in the tank. Lastly, some plants can be grown very successfully with a minimal amount of light, so, it depends on how much work you wnat to put into the tank. High and low tech tanks are very different in the amount of work needed to accomplish a certain look.
The last plant guru who spoke at out club, says T5 over LED. He was basing this on actual meter readings in a tank lit by each.
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Old 11-27-2014, 01:52 PM   #35
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I have Finnex and Kessil lighting. I love Finnex, but I swear by Kessil. I have 2 kessil A360WE Tuna Sun fixtures that I run at half intensity with excellent plant growth. Truth be known, I could do just as well with 2 A150WE Tuna Sun fixtures which is less expensive, but they are not adjustable for color or intensity. Kessil will soon have an A160WE fixture that is adjustable just like the A360.


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Old 11-27-2014, 02:04 PM   #36
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\
The last plant guru who spoke at out club, says T5 over LED. He was basing this on actual meter readings in a tank lit by each.
But you can't get an accurate PAR reading with LEDs. Lumens would not be accurate either, since not all light is used by photosynthetic organisms. You would need to measure PUR, which you cannot do without extremely expensive equipment.
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Old 11-27-2014, 02:19 PM   #37
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But you can't get an accurate PAR reading with LEDs. Lumens would not be accurate either, since not all light is used by photosynthetic organisms. You would need to measure PUR, which you cannot do without extremely expensive equipment.

Agreed. I had a 4X54 watt T5HO on a 55 gallon and thought that was as good as it gets. Once I went to LEDs the plants "pearled" like crazy. I am a believer in LEDs.


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Old 11-27-2014, 02:35 PM   #38
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Agreed. I had a 4X54 watt T5HO on a 55 gallon and thought that was as good as it gets. Once I went to LEDs the plants "pearled" like crazy. I am a believer in LEDs.


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Old 11-27-2014, 07:13 PM   #39
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Is it possible to use a substitute? I saw light meters mentioned in the article and these look much cheaper.
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Old 11-28-2014, 05:57 AM   #40
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LED or T5...?

http://3.bp.blogspot.com/_cwbt2D65i9...hlorophyll.jpg

As shown above, plants need the majority of the light to be around 400-450nm and 650-675nm (or blue and red light). The blue light is used for leaf growth, and promotes bushy, compact growth, while red light is mainly used for flowering and strong stems. They reflect most green light, thus explaining why leaves are green.

http://www.aquatic-eden.com/2007/12/...arium.html?m=1[/QUOTE]


Right, well one thing's for sure. I'm going for LED...!

Brookster, I like the look of the Finnex you recommend, but can't find them in UK...!

I was recommended these AquaGro GroBeams by a guy in a British forum and went to my LFS to check them out. I took pictures of the front and back of the box, cause the back has the spec and I've attached them too.

The guy in the shop recommended the Ultima - the broad spectrum natural white units (the spec on the left, which to me looks like too much "wasted" green and almost no red) but there's another model called the ColourPlus. (The spec on the right which almost perfectly matches the chart showing colour temperature most beneficial to plants...!)

Now, I'm hearing that it's as bad for plants to have too much light as too little and the very blue / red units may over cook them. And also they would not look very natural, but may help the colours in the fish "pop".

So, here's my theory. The guy in the shop says 3 of these will be perfect for my tank. I think 3 ColourPlus may be over kill, but I'd like some of that spiky blue / red light in there too. (Note the ColourPlus is made up of 4 white LEDs, 2 red, 2 blue and 2 green while the natural daylight ones are just 10 x white). What if... I put 1 natural daylight unit at either end and 1 ColourPlus dead centre (3 units in total). This way 24 of the LEDs in the tank are still white, but I'll have an area at the centre of the tank where I'll have an open space that's lit with the more colourful range to enhance the fish colours, but without making the whole tank look unnatural or over lighting the plants...

What do you think?

Also, looking at the spec sheets, is 3 of these running the length at the centre of this tank (44" x 20" x 24") going to be the correct amount of light. They're like 2000 Lumens each...

Thanks guys...

(Pics in next post)

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