T5HO lighting for 46g bowfront - The Planted Tank Forum
 
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post #1 of 13 (permalink) Old 01-27-2013, 10:40 PM Thread Starter
Algae Grower
 
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T5HO lighting for 46g bowfront

Measurments for the tank are 36l x 16d x 20t

I was thinking about getting a 36" 156W light with 4 bulbs but think that might be way more light than I need. Would I be ok going with just 2 36W bulbs?

Thanks
Nick
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post #2 of 13 (permalink) Old 01-27-2013, 11:01 PM
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Quote:
Originally Posted by unicknn View Post
Measurments for the tank are 36l x 16d x 20t

I was thinking about getting a 36" 156W light with 4 bulbs but think that might be way more light than I need. Would I be ok going with just 2 36W bulbs?

Thanks
Nick
4 bulbs = Too much light!!!

I think 2 bulbs might be ok , are you using co2?
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post #3 of 13 (permalink) Old 01-27-2013, 11:10 PM Thread Starter
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Yes I will be using CO2 and more than likely ferts as well. Is 2 going to be enough or would it be better to just get the 4 bulb fixture and just use 3 of them?
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post #4 of 13 (permalink) Old 01-27-2013, 11:55 PM
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Quote:
Originally Posted by unicknn View Post
Yes I will be using CO2 and more than likely ferts as well. Is 2 going to be enough or would it be better to just get the 4 bulb fixture and just use 3 of them?

I personally think 3bulbs will cause u algae problems ..
If you plan on upgrading to a bigger tank within a yr . Just get a 2 bulb t5 system ... Catalina aquarium lights are great..

Which lighting system you wanted to buy?
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post #5 of 13 (permalink) Old 01-28-2013, 01:56 AM
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It does depend on the brand of light. But two bulb of t5HO is more than enough in most instances.

Btw if you are using CO2, then you definitely need to use ferts as well.
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post #6 of 13 (permalink) Old 01-28-2013, 05:38 PM Thread Starter
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Im going with a cheap Odyssea.
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post #7 of 13 (permalink) Old 01-28-2013, 05:59 PM
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Lights

I have a 50g tank and I use T5HO. I have about 17" from substrate to bulb. One bulb give me a par of 45 or just into the medium range. Two bulbs would put me over the top of high range.

4 x T5HO is too much.
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post #8 of 13 (permalink) Old 01-28-2013, 06:08 PM Thread Starter
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my light will be about 20" from the subtrate
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post #9 of 13 (permalink) Old 01-28-2013, 06:17 PM
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Quote:
Originally Posted by unicknn View Post
Measurments for the tank are 36l x 16d x 20t

I was thinking about getting a 36" 156W light with 4 bulbs but think that might be way more light than I need. Would I be ok going with just 2 36W bulbs?

Thanks
Nick
Hi Nick,

I have a 45 gallon tall (36"X12"X24" tall) with CO2 and Ei ferts and have very good success growing all species (including foreground plants) with 1X96 watt AH Supply power compact kit. I would suggest about the equivalent amount of lighting on your tank if your light has quality individual reflectors.


Roy
75 Gallon, 2X55W AH Supply CF 8800K, 1XMarineland Doublebright, 2X Marineland 350 Magnum; 45 Gallon Tall, 96Watt AH Supply CF 6700K; 30 Gallon Long; Fluval F&P 2.0 36"/46W; 20 Gallon, 1X26W AH Supply LED kit; all with Press. CO2; (Calcined) Montmorillonite Clay
Greater Seattle Aquarium Society (GSAS)

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post #10 of 13 (permalink) Old 01-28-2013, 06:51 PM
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From this thread:



Assuming you have 20" between the bulbs and substrate, you get 50 PAR at the substrate, which just qualifies for high light.

Notice how the line for the Odyssea drops much faster than others at longer distances. It's my understanding this is due to unusually poor reflectors, and bulbs spaced too close together; both of which reduce the amount of light thrown downwards where we really need it. So you may run into issues with algae as plants approach the top of the tank and receive too much light. But if you raise the fixture to compensate for that, then plants at the substrate may not get enough light. In fact, I'm currently in a PM exchange with someone who seems to have had this exact problem with the Odyssea.

Though I wouldn't consider the Odyssea completely unusable by any means, it is a case of you get what you pay for. So I'd do a little more shopping and research before committing to it. I'm afraid I can't give any personal recommendations for commercial alternatives, as I built the 2x T5HO fixture for my 46G bowfront, and to some rather unusual specifications.
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post #11 of 13 (permalink) Old 01-28-2013, 08:03 PM Thread Starter
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Yea I know its not the best light out there and Im expecting to change it out in the future but it'll get me started. Ive dumped alot of money into this project and still have alot to go.
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post #12 of 13 (permalink) Old 02-05-2013, 03:16 AM
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still getting head aroung PAR

Hi im a newby to aquascaping and doing my best to get all the hardwhere sorted before i start. Some people are saying that a total of 96 watt of t5ho tould be more than enough for a co2 injected planted tank. My tank is a 60 cm cube and im having a lot of conflicting advice on how much lighting i need for a medium lighted tank. 96watts with t5ho on a 60cm cube is 4 24w tubes. IS this too much. please help.
Ta
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post #13 of 13 (permalink) Old 02-05-2013, 11:31 PM Thread Starter
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well it depends on which light it is. If its a cheapo Odyssea like the one I just ordered:

http://www.amazon.com/dp/B007T9JBB4/..._M3T1_ST1_dp_1

You could probably stand to have more power than the 96W kit that was posted earlier.
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