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Old 05-19-2015, 07:17 AM   #141 (permalink)
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Default Re: PAR data collection

On an interesting side note. The hood for this tank had built in Tetra LEDs, marketed as ideal for plant growing. These leds measured Par 3 at the bulb and had no measurable par at the substrate.

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Originally Posted by Michael View Post
Thank you for posting this. I've used the Sylvania compact fluorescents on 5 of my 6 tanks for years, and the clamp light fixtures are especially good because they hold the CFLs in the vertical position. CFLs produce significantly more light (for aquarium purposes) when mounted vertically in a reflector. The reasons are complex and are mostly due to a phenomenon known as restrike.

Planted tank enthusiasts, throw off your chains! Effective aquarium lighting can be cheap and easy.
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Old 05-19-2015, 10:53 AM   #142 (permalink)
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Default Re: PAR data collection

We tested the Aqueon LED fixtures at a shop during one of our meetings. These were the expandable ones that you can add 2 extra LED strips to the one that comes standard. They were a little better than your Tetra, but even with all 3 strips installed, the fixtures are essentially worthless for planted tanks.
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Old 05-19-2015, 12:50 PM   #143 (permalink)
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Default Re: PAR data collection

I think the finnex has been the only plant led I've seen with good par. then you get in to the saltwater led, and got lots to choice from but then you look at 300-800 dollars.
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Old 05-22-2015, 10:23 PM   #144 (permalink)
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Default Re: PAR data collection

I started making my own LED fixtures about 8 years ago for my salt water tanks. Home built was a fraction of the cost of commercial fixtures and with the commercial fixtures I heard loads of Complaints from people that even spent $1000.00+ on fixtures.

Now that i converted all my tanks to fresh water I found I have to detune the fixtures considerably. On some of my tanks i'm getting fantastic plant growth with less than 1/2 watt per gallon. The thing though is I'm using LED that are producing 150 plus lumns per watt. And I'm tuning the spectrum for plants.

On my brightest tank I'm using 18 Watts on 30 gallon tank. I had to reduce my cycle time to about 5 hours per day in order to keep algea under control.
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Old 05-23-2015, 05:10 PM   #145 (permalink)
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Default Re: PAR data collection

TropTrea,

I just sent you a message about a DIY LED fixture for a 6' tank. Please check it out.
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