The Planted Tank Forum - View Single Post - DIY led lighting - have I got it right before purchasing
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Old 01-04-2013, 10:02 PM   #9
-Az-
Algae Grower
 
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thanks for doing that steve

there seems to be a lot of yellow and green in the spectrum (wasted energy?)

i'm still concerned with the kelvins ( in regards to penetration)

"It is also noteworthy that many "terrestrial plant lights" as well as many aquarium plant lights (often are lower in kelvin temperature) have more "red nanometer spikes" than higher kelvin 6500k, 10,000k & higher lamps.
The problem with these lights is that while all plants utilizing photosynthesis require the same essential ABCs of PAR (see the PAR section), the facts of light energy penetrating water requires higher kelvin (6500k +) be added to provide maximum PUR (see Useful light energy/PUR section). Aquatic Plants and corals have adapted/evolved to the natural light energy at certain depth of water and the misguided attempt to adapt these terrestrial plant lights is not going to be 100% effective as a light with more water penetrating blue & slightly lower red nm energy."
aquarium lighting by carl strohmeyer

I,m starting to think about adding some reds in strategic locations about the substrate
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