3k+5k diodes= 4k light??
- Thread starter Noodles42
- Start date
Moflow
Well-Known Member
3500K is a good all round spectrum for both vegging and flowering.
3K and 5K is 4K ish on an even mix of them on a board or strip. Not so sure with one 3K board and one 5K board whether you'd get a good blend.
Don't sweat it.
I now use 3000K and 3500K for flowering.
4000K for clones, vegging. Nice tight bushy plants.
I've used 3K for vegging no problems.
I've tried 4K for flowering and I wasn't keen on the outcome. I found plants were more leafy.
3K and 5K is 4K ish on an even mix of them on a board or strip. Not so sure with one 3K board and one 5K board whether you'd get a good blend.
Don't sweat it.
I now use 3000K and 3500K for flowering.
4000K for clones, vegging. Nice tight bushy plants.
I've used 3K for vegging no problems.
I've tried 4K for flowering and I wasn't keen on the outcome. I found plants were more leafy.
Lockedin
Well-Known Member
It's a little ironic - we all moved away from "burple" (red / blue lights) and moved to straight 3,500K for a bit (successfully, not knocking it at all).
Now we're moving back to a red / blue enhanced spectrum - just more subtle and easy on the eyes.
3,000k has more of the red side of the spectrum, expressed mostly in yellows & oranges - "warm white"
5,000k has more of the blue side, expressed in blues and (sometimes) greens with purple highlights.
Add all those together and you get - white (sort of).
Here's my current spectrum.
2,700k - lots of orange and - RED in the spectrum of these "warm white" diodes.
5,000k - a lot of BLUE and green with a little yellow to fill out the "white" spectrum.
12 bars in all - 8 @ 2,700k & 4 @ 5,000k - 480w total (though I don't run it at 100%)
Makes an odd looking "white" - warm/cool with a green cast to it. I'm planning to add some UV and IR at some point, but tbh I'm not sure why - I like the flowers these lights grow!
gl
Now we're moving back to a red / blue enhanced spectrum - just more subtle and easy on the eyes.
3,000k has more of the red side of the spectrum, expressed mostly in yellows & oranges - "warm white"
5,000k has more of the blue side, expressed in blues and (sometimes) greens with purple highlights.
Add all those together and you get - white (sort of).
Here's my current spectrum.
2,700k - lots of orange and - RED in the spectrum of these "warm white" diodes.
5,000k - a lot of BLUE and green with a little yellow to fill out the "white" spectrum.
12 bars in all - 8 @ 2,700k & 4 @ 5,000k - 480w total (though I don't run it at 100%)
Makes an odd looking "white" - warm/cool with a green cast to it. I'm planning to add some UV and IR at some point, but tbh I'm not sure why - I like the flowers these lights grow!
gl
Noodles42
Member
So by that measure, you would call a light like this one 4k?It's a little ironic - we all moved away from "burple" (red / blue lights) and moved to straight 3,500K for a bit (successfully, not knocking it at all).
Now we're moving back to a red / blue enhanced spectrum - just more subtle and easy on the eyes.
3,000k has more of the red side of the spectrum, expressed mostly in yellows & oranges - "warm white"
5,000k has more of the blue side, expressed in blues and (sometimes) greens with purple highlights.
Add all those together and you get - white (sort of).
Here's my current spectrum.
2,700k - lots of orange and - RED in the spectrum of these "warm white" diodes.
5,000k - a lot of BLUE and green with a little yellow to fill out the "white" spectrum.
12 bars in all - 8 @ 2,700k & 4 @ 5,000k - 480w total (though I don't run it at 100%)
Makes an odd looking "white" - warm/cool with a green cast to it. I'm planning to add some UV and IR at some point, but tbh I'm not sure why - I like the flowers these lights grow!
gl
Lockedin
Well-Known Member
That's what I was looking for - thanks!
I'd call it mixed spectrum 3,000k & 5,000k with 660nm supplemental diodes.
It's not 4k.
A 4,000 Kelvin diode is 4k, mixed is mixed.
Edit - not trying to be too snarky with that response, but it's true.
Re:
A 5,000k diode contributes too much blue / violet too make 4k...
A 3,000k diode contributes too much yellow / red to the equation to make 4k...
The two together equal more than the sum of the parts.
Last edited:
Horselover fat
Well-Known Member
The colour temp just means how blue or red the light is. It tells you nothing more. These are all 5000 k spectrums.
Lenin1917
Well-Known Member
Shit I just look at the spectrograph and go for the one with the nice red spike usually(always) it’s a mix of 3000k and 5000k with some 660 deep reds. Don’t know how good using different spectrum boards would work, I’m assuming the plants directly under the 5000k are gonna be shorter and have more veg growth in flower. And the ones under the 3000k will probably have longer node spacing and denser buds. Plenty of really good deals on lights in pretty optimal spectrums right now, diodes already mixed.
Lockedin
Well-Known Member
On a busted equipment break, I watched a lighting director give a "painting with light" tutorial.The colour temp just means how blue or red the light is. It tells you nothing more. These are all 5000 k spectrums.
Using 3 Leko spots (1k watt xenon IIRC) and primary RYB gels (one for each light),
he focused all three spot lights on one, white surface.
Primary yellow (green works too, but I'd cooler temp.)
Primary Red
Primary Blue
When focused in the same spot, they make white.
Even though it appears white, the spectral would resemble the flourescent - 3 massive peaks of mono-tone light that appear white to us.
Moflow
Well-Known Member
I suppose at the end of the day you could grow with any spectum. Red and blue, burple, pinks, whites, enhanced whites HPS, CMH etc.
Some are just more efficient than others.
Photons come first, spectrum second, within reason.
Done a bit of amateur experiments with spectrums and found the best spectrum for giving an HPS like stretch in early flower - the first 4 weeks or so was 3000K + 660nm + 730nm.
Next I need to run the plants through from start of flower to the finish with that spectrum and see the results.
Looks something like this
Some are just more efficient than others.
Photons come first, spectrum second, within reason.
Done a bit of amateur experiments with spectrums and found the best spectrum for giving an HPS like stretch in early flower - the first 4 weeks or so was 3000K + 660nm + 730nm.
Next I need to run the plants through from start of flower to the finish with that spectrum and see the results.
Looks something like this
