Buying led diodes off eBay. Help converting listed K to approximate nm range???

DavidinGA

DavidinGA

Active member
I am shopping for some led diodes and found a guy I want to order from but he is selling the diodes by K instead of the nm values.

Any idea what these would equate to in nm?


Specification

Color and Temperature

Warm White (3000-3500k)
Cool White (6000-6500k)
Neutral White (4000-4500k)
Cood White (10000-15000k)
Cood White (20000-25000k)
Cood White (25000-30000k)


...No idea what Cood white means, its a Chinese listing lol



Do they make "white" led diodes in the 30000k range???

Thanks
 
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Another question on another eBay seller...what is the "better" royal blue led range?

They have one that is 445-450nm and another that is 455-460nm; both are "royal blue". Would the 445-450nm be better here?

$_57.JPG
 
I may be wrong, but from my experience, the white LEDs don't normally have NM qualifier. As far as the 30000K LEDs, I have a few and they are almost blue. They look awesome and they make things really pop in the tank.

For the Royal blue LEDs, I would go with the lower range. 445NM - 450NM, is better.
 
White LEDs aren't a single frequency due to the phosphor.

The price may be right, but with the huge variance in Vf I'd be concerned with what you are getting.
 
theatrus said:
White LEDs aren't a single frequency due to the phosphor.

The price may be right, but with the huge variance in Vf I'd be concerned with what you are getting.
Click to expand...
How much vf variance is typical?

I'm looking to replace some diodes on a cheap eBay box so I wouldn't think these would be any worse than what's already in there, right?
 
Cree XT-E RB is 450-465NM
Cree X-RE Bl is 465-485NM

I messed around with some inexpensive diodes, for the price you can get a bunch and if you don't like them, oh well, no big loss.

If you search around can find some violets in the 420NM range
 
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