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Old 24-04-2006, 06:26 PM posted to rec.aquaria.freshwater.plants
John Sankey
 
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Default "watts per gallon"

"Try 70-90 lumens ... for most FL's."

My original assumption was a bit lower than that. However, when I
started checking with local aquarists, I discovered that most
were running 18-24" T12 lamps which are less efficient even when
new. I also discovered that most replaced their lamps only when
they failed, which cuts lumens further by typically 20%.

Hence my request for real data on a broader scale than one local
club.

"(a poor measure of PAR BTW) "

I agree - see http://sankey.ws/plantlumen.html

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Old 24-04-2006, 11:12 PM posted to rec.aquaria.freshwater.plants
Richard Sexton
 
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Default "watts per gallon"

It's a very rough metric. In one sense it'd be easier to convert the tank
to gallons then use the existing rule.

You're in Canada and so am I and while this is 100% a metric country,
aquariums are still sold in gallon sizes.

Watts per foot or square meter might work for you, but as Tom points
out depth needs to be taken into consideration.

But, it's a rough metric and has always remained a riough metric because
it's not that important. After a while you'll know what you're doing more
and have an innate feel for it.

What size is the tank and what lights do you have on it now??

--
Need Mercedes parts? http://parts.mbz.org
Richard Sexton | Mercedes stuff: http://mbz.org
1970 280SE, 72 280SE | Home pages: http://rs79.vrx.net
633CSi 250SE/C 300SD | http://aquaria.net http://killi.net
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Old 26-04-2006, 06:19 AM posted to rec.aquaria.freshwater.plants
Mitch Edelman
 
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Default "watts per gallon"

In dealing w/ wattage, what adjustments do you make for height?
I have 120 G aquarium with 2 ft. height -

Were the aquarium say 18 inches tall instead of its actual height, would
that affect the calculation of watts/gallon?

Thanks in advance,

Mitch Edelman



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Old 30-04-2006, 01:59 AM posted to rec.aquaria.freshwater.plants
UnworthyDuDe
 
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Default "watts per gallon"

On my planted aquariums i use 4ft t8 fixtures and combinations of phillips
f32/natural sunlight and f40dxplant and aquarium builds, with great success
2 bulbs on each 45 AND 4 bulbs on my 120
"Richard Sexton" wrote in message
...
It's a very rough metric. In one sense it'd be easier to convert the tank
to gallons then use the existing rule.

You're in Canada and so am I and while this is 100% a metric country,
aquariums are still sold in gallon sizes.

Watts per foot or square meter might work for you, but as Tom points
out depth needs to be taken into consideration.

But, it's a rough metric and has always remained a riough metric because
it's not that important. After a while you'll know what you're doing more
and have an innate feel for it.

What size is the tank and what lights do you have on it now??

--
Need Mercedes parts? http://parts.mbz.org
Richard Sexton | Mercedes stuff: http://mbz.org
1970 280SE, 72 280SE | Home pages: http://rs79.vrx.net
633CSi 250SE/C 300SD | http://aquaria.net http://killi.net





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