Fluval 3.0 - The Planted Tank Forum
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post #1 of 8 (permalink) Old 06-10-2019, 10:07 PM Thread Starter
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Fluval 3.0

Anyone here uses the fluval 3.0? What's the par at 24" deep and please help me to understand this, would the par rating at 24" deep be the same on the 36" 45watt and the 48" 59watts? Someone told me it's the same light but different lengths so the par would be the same. I find this odd because one has more leds plus higher watts.
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post #2 of 8 (permalink) Old 06-11-2019, 12:48 AM
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PAR on the 48" model at 24" should be around 45 mMol per fixture, looking at the ratios in the PAR chart.

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post #3 of 8 (permalink) Old 06-11-2019, 02:15 AM
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Maybe they mean the same LED density?
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post #4 of 8 (permalink) Old 06-11-2019, 02:30 AM
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Think of it this way.....but sideways.
More diodes..more overlap..more PAR in certain areas..
Most small LED fixtures are lensed 120 degrees..
@ 24" light cone is 83" in diameter..


https://www.luxlight.de/en/groluxled-2/
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Last edited by jeffkrol; 06-11-2019 at 02:34 AM. Reason: edit
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post #5 of 8 (permalink) Old 06-25-2019, 03:26 AM
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I would say that PAR should be tge same because the longer fixture spreads over a longer distance. The additional LEDs are there to cover more surface area. The PAR will be higher only if the LEDs are denser.
post #6 of 8 (permalink) Old 06-25-2019, 04:29 AM
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Originally Posted by [email protected] View Post
I would say that PAR should be tge same because the longer fixture spreads over a longer distance. The additional LEDs are there to cover more surface area. The PAR will be higher only if the LEDs are denser.
No..............
simple example..




find any light where the series is measured (i.e same density) and you will see PAR increase..
Finnex comes to mind
Granted it's usually measured dead center but the overlap (more linear diodes) contributes more PAR.

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post #7 of 8 (permalink) Old 06-25-2019, 07:48 AM
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No..............
simple example..




find any light where the series is measured (i.e same density) and you will see PAR increase..
Finnex comes to mind
Granted it's usually measured dead center but the overlap (more linear diodes) contributes more PAR.
I guess, if we measure in the center then yes there will be some overlap that will contribute to some increase in PAR but not as much as some might think. Meaning if roughly 5 diodes would give us 5 PAR then adding another 5 diodes will not give us another 5 PAR but less. Depending on how close the diodes are and how much the light really overlaps.

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post #8 of 8 (permalink) Old 06-25-2019, 02:12 PM
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I have a the Fluval 2.0 and the 3.0. I'm not sure off the top of my head what size, but I'm thinking they are both 36". I admit I don't understand any of this PAR stuff. What I've been looking for is some chart or reference on where I should put my settings, as percentages, for med and high light for planted aquariums. One tank is a low tech 29 gallon and the other a standard 45 gallon with CO2. The 29 is getting moved and a make over this week.

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