Kelvin and Nanometers

**rkm** · 01-21-2008, 01:29 PM

Can someone tell me if there is a relation between Kelvin and Nanometers? Meaning, can the two be converted into each other? If so, what would a 2700K convert to in nanometers. I am thinking the two are totally different but hell, had to ask.

**snaggy** · 01-24-2008, 12:32 PM

Bump.
Good question I would also like to know.

There has to be a relation, otherwise how would plants grow under LED and nm alone, or CFL, HID & kelvin alone.
Yet I cannot find any substantial facts anywhere on the net with the relation of the two.
In a CFL post I was asking for a CFL kelvin/nm chart of the most common cfl spectrums.
You would figure if the manufacturers hardware really works, they would want to show you its performance.
Or even astronomer's with a season sun kelvin/nm chart.
LOL.

Here mentions abit of the relationship nm and kelvin.......Yet I cannot make shit of their graph charts to understand it.
The Double Amici Prism Hand-Held Spectroscope

Would sure be good to see some real substantial grapgh charts in relation to kelvin and nm.

**mdgtptrl** · 01-24-2008, 12:38 PM

here's the kelvin scale:
http://images.digitalmedianet.com/20...0/story/02.jpg

and here's a wavelength scale:
http://www.giangrandi.ch/optics/spectrum/visible-a.jpg

match color to color and you have kelvin to wavelength.

Now, keep in mind that any light source (except LEDs) produces a broad spectrum... ie it's not JUST that one color. The color temperature of a bulb is basically the average color emitted and what we see with the naked eye, i believe

edit: quick reference about the kelvin color temperature scale. The way it works is this: a black body at a given kelvin temperature (3000k, let's say), emits light of that color. You know how iron glows red when it's really hot? Similar idea.

**snaggy** · 01-24-2008, 02:56 PM

Thanks for the links.
Here some more on kelvin spectrum and nlites spectrum tests.

Man, I want a 11000k CFL !
LOL
They are used for aquatic life.
But the Actinic (11000k) spectrum looks super sweet, and the most cost efficient use of output energy of the bunch for vegging!

Only available in linear tubes that I have found so far.

**mdgtptrl** · 01-24-2008, 03:00 PM

what you really want is the bulb that has this spectrum that you posted:

http://www.rollitup.org/attachments/...tes-25000k.jpg

nurturelites makes a purple spectrum CFL that's 25000k... it has a peak at both photosynthetic peaks. nlite

**rkm** · 01-24-2008, 08:53 PM

Originally Posted by snaggy

Thanks for the links.
Here some more on kelvin spectrum and nlites spectrum tests.

Man, I want a 11000k CFL !
LOL
They are used for aquatic life.
But the Actinic (11000k) spectrum looks super sweet, and the most cost efficient use of output energy of the bunch for vegging!

Only available in linear tubes that I have found so far.

I am hooking two sets up tonight.

**mdgtptrl** · 01-25-2008, 12:25 AM

Originally Posted by rkm

I am hooking two sets up tonight.

cool. keep us updated.

**moon47usaco** · 01-25-2008, 12:56 AM

Everyone likes to talk about these nlites but i do not believe they exist... Where can you buy them... I sent 2 emails to almost all the links on the nlites sight asking where to order and still no response... =[

**lucindrea** · 10-14-2011, 03:01 AM

nm = 2,897,768 / K

**Diabolus Sonata** · 10-15-2011, 10:31 AM

Ushio makes awesome 10,000 12,000 and 20,000 K bulbs fo the aquarium. In saltwater the carals grow awesome under 4500 with little color, 10,000K you get good growth and good color, 20,000K corals grow slower but have amazing colors. This is debated hard on fish boards tho so, its just what I noticed in my reef tanks. And yes K = NM on some scale.