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View Poll Results: Do you think watts per gallon is an accurate measurement for amount of light needed?
Very accurate 0 0%
Partially accurate 11 52.38%
Not accurate 3 14.29%
Totally unreliable for accuracy 7 33.33%
Voters: 21. You may not vote on this poll

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Old 08-17-2003, 12:09 PM   #11
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Steve,
When i first started it out and believed my fish store i have like 4 50 watt NO bulbs over my tank for 4 watts per gallon, my bubble coral did not do to well untill i got my 150 att MH, which is 3 watts per gallon
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Old 08-17-2003, 05:20 PM   #12
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Ok Stevie I'll bite . I really think WPG is a useless way to get a grasp on your tank linghting. Thier are way to many varibles that come into play. Examples of the extremes would be the following. A person has a 4 foot tank with only 1 Mh bulb. So say it a 90 now they are only going to get a 2 sq.ft of good lighting the rest will suck. Say a person has VHO or PC lighting. Well 200 watts of VHo is spread over the length of the 4 foot bulb where on 200 watts of MH its spread over an inch. More point of source, better setup. Say I have 4 250 HQI MH over a 8 foot tank About 500gals) that would only be 2 WPG, but in reality thats an awesome lighting setup???

Thier are just to many variables, and it tends to leed folks astray of what they actually need. Anyway just my 2 cents


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Old 08-17-2003, 06:19 PM   #13
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Agreed there are many variables to consider and the WPG guideline should only be used as a rough estimate or possibley not at all. I was not really arguing that point at all.

Disagreeing is perfectly acceptable, especially in this hobby I was more curious as to people's reasoning. Simpley stating an objection without the reasoning behind it doesn't help further the discussion.

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Old 08-17-2003, 06:58 PM   #14
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Agreed, Alot of times folks make these little formulas to help out and then after a year or so they turn into the grand fubaaa


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Old 08-17-2003, 10:10 PM   #15
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mojo and steve,
Ah yes your so correct! Lighting has far to many variables to be in any way accurate and this is why i posted this poll. Watts/gallon is totally irrelevant. It was also stated that MH are based off wattage for depth. I also find that incorrect. IMHO i feel that watts per gallon is totally inaccurate for any measurement of light. Considering watts is based off of electricity consumed not light produced, im working on a way to calculate watts per gallon to lumens per gallon. Lumens being since thats how light is measured.
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Old 08-18-2003, 11:03 AM   #16
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You guys might want to check this out!


http://www.thekrib.com/Plants/Tech/intensorama.html

http://www.thekrib.com/Lights/depth.html
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