The Planted Tank Forum - View Single Post - Lighting an Aquarium with PAR instead of Watts
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post #109 of (permalink) Old 01-21-2013, 04:29 AM Thread Starter
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Originally Posted by Switch View Post
I'm having exactly the same doubts... Specially cause the mixtures of bulbs seems to be less intense then with 2 6k bulbs... On the other hand the roseate is supposed to work on a more appropriate wavelengh for photosynthesis. Would be cool to figure how this balances out... Hoppy!! Can the roseate bulb be less intense to the human eye, compared with a 6k bulb, but have the same strengh in par usable by the plants??
Assuming the roseate bulb produces a lot more red than the 6500K bulbs, it will look much dimmer, at the same PAR, than the 6500K bulbs. Our eyes are not very sensitive to red light, but very sensitive to green and yellow light.

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