Lighting WPG problem. - The Planted Tank Forum
 
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post #1 of 6 (permalink) Old 05-05-2016, 11:33 PM Thread Starter
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Lightbulb Lighting WPG problem.

I have a 7 gallon rimless cube and I am really confused on what lighting I should choose.
Mainly because lots of information says you need at least 1.5 Watt/Gallon to achieve medium light.
This means to achieve medium light I need to get a 10+ watt light.
BUT most finnex led light(fudgeray, planted+) fit to my tank (11.9*11.9*11.9) are less than 5 Watts.
What should I choose?
Does this 1.5 Watts/Gallon rule apply only to fluorescent light or also on led light?
I am really confused, thanks for anyone who helps.
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post #2 of 6 (permalink) Old 05-06-2016, 12:44 AM
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I believe that "watts per gallon" was originally designed for t-12 bulbs, and not for small tanks. Check out the lighting forum, and more specifically the sticky:

https://www.plantedtank.net/forums/10...icles-faq.html

Do a little reading and ask some specific problems there.

Standard 10 Gallon (20 x12x12).
Low tech, Sand substrate.
Eheim 2211, and Aqueon Quietflow 10.
Finnex Stingray LED, 20" above substrate
2 Anubias Nana Petite, Christmas moss.
4 Halequin Rasborahs, 5 RCS.
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post #3 of 6 (permalink) Old 05-06-2016, 01:08 AM Thread Starter
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Quote:
Originally Posted by livingword26 View Post
I believe that "watts per gallon" was originally designed for t-12 bulbs, and not for small tanks. Check out the lighting forum, and more specifically the sticky:

https://www.plantedtank.net/forums/10...icles-faq.html

Do a little reading and ask some specific problems there.
Many thanks. I did some research and find out par mean much more than watt on led. Thanks.
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post #4 of 6 (permalink) Old 05-06-2016, 01:43 AM
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I use the fugeray clip on lights on a 5g and a 3g tall, and it's plenty of light for what i need, I'd call it medium. If you're concerned about not having enough light you can always put 2 of them on your tank...


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post #5 of 6 (permalink) Old 05-07-2016, 04:20 AM Thread Starter
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I just found some info on the par reading of a wave-point 8 watt micro sun led. On a 5 gallon(12'' from light to substrate) it reads about 80-95.
So for my 7 gallon cube which is about the same height it should be considered medium to high light(I can always adjust the light higher).
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post #6 of 6 (permalink) Old 05-07-2016, 07:56 AM
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Quote:
Originally Posted by jiawei357 View Post
I just found some info on the par reading of a wave-point 8 watt micro sun led. On a 5 gallon(12'' from light to substrate) it reads about 80-95.
So for my 7 gallon cube which is about the same height it should be considered medium to high light(I can always adjust the light higher).
Low light - 15-30 micromols of PAR - CO2 is not needed, but is helpful to the plants
Medium light - 35-50 micromols of PAR - CO2 may be needed to avoid too many nuisance algae problems
High light - more than 50 micromols of PAR - pressurized CO2 is essential to avoid major algae problems


Definitely High light. It will keep you busy.

Standard 10 Gallon (20 x12x12).
Low tech, Sand substrate.
Eheim 2211, and Aqueon Quietflow 10.
Finnex Stingray LED, 20" above substrate
2 Anubias Nana Petite, Christmas moss.
4 Halequin Rasborahs, 5 RCS.
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