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Old 07-16-2014, 01:48 PM   #121
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Quote:
Originally Posted by Brian_Cali77 View Post
Why don't you guys invest or rent a Licor meter? Is it that difficult? I would think that a company so invested in the business of lighting aquariums would absorb that into the cost of doing business.
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PAR readings for the planted+ would be very nice.
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Old 08-22-2014, 02:35 AM   #122
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Is there a picture of the wavelength (nm) spectrum of the Planted+? (sorry if I've missed it somewhere obvious, but I can only find it for the red LEDs)
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Old 08-22-2014, 01:43 PM   #123
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I don't think they have a measured combined spectrum published anywhere, only graphs for the individual LEDs.

The fixture consists of roughly 2/3 7000k white, and 1/3 660nm red LEDs, with a small number of the white LEDs replaced with the blue "moonlights".

You've found the spectrum for the red LEDs, here's a post containing the spectrum for just the white LEDs:

http://www.plantedtank.net/forums/sh...d.php?t=189944

Unfortunately, this fails to give us an idea of what the balance between the two looks like when combined.

There are roughly half as many red LEDs as white, but they are putting all their energy into a narrow band, while the white ones are spreading out over a broader band. I'd speculate that the red spike ends up being noticeably taller (maybe 50%-25% taller?) than the blue spike from the 7000k's, but that is only semi-educated guesswork.
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Old 08-27-2014, 01:38 PM   #124
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I can probably throw together PAR readings on my blog. It will have to wait a few days as I am in the middle of another project.
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Old 08-27-2014, 04:20 PM   #125
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I can probably throw together PAR readings on my blog. It will have to wait a few days as I am in the middle of another project.
Do you have access to a PAR meter that can detect light at 660nm? (ie: not an Apogee, which cuts off all light above 650nm).

If you do I'd be very, very interested!
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Old 08-28-2014, 03:39 AM   #126
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I am very interested - want to see par and pur readings as well as wave length.


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