01-18-2014, 11:02 AM
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#73 (permalink)
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Senior Member
Join Date: Jan 2014 Location: Mukwonago Wisconsin
Posts: 654
| Re: Color Temperature Quote:
Originally Posted by faltaren I need some help. I want a LED ramp that is GOOD for plants and LOOKS good. And i want it in around 8000 K if its possible.
I want to use cree leds and I have some ideas.
Cree led xp-G cool white and warm white to get the red and the blue spectra. I also want to add some blue xp-E for some blue in the the 475 nm area and moonlight.
No to the problem, I have 36 led to play with and i want it to LOOK GOOD to. How many of every led do i need to get a good plant light and make it look good? cree.com have all the charts and colortemps. Please help me  | I have worked with there LED's extensively on Reefs. Planted fresh water tanks are almost simpler. Looking at 36 LED's I would start with a split between the cool whites (6,500K) and the Neutral Whites ( 4,500K). You would want a couple more of the cools to boast your blues and this gives a nice starting color for most people. so a base would be 16 neutral Whites and 20 Cool whites. But the color temp would be closer to 6,000K. To boast up the color temp to 8,000K I would replace probably 4 or 6 of the Whites with the True Blue 470nm LED's. Replace an equal number of the cool and the neutrals to keep a good balance.
Note you mentioned the warm whites. I would not use these I think they are way too much red and not enough blue. Also keep in mind that the K scale does noit ever reach blue but peaks out in the cyan region of the spectrum, 6,000K and 10,000 K are very white in most peoples eye. |
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