I know Vf gets higher as wavelength gets shorter. Blue led's have higher Vf than red led's, etc. White led's have high Vf because they're really blue surrounded by a phosphor.
I'm wondering whether there's a continuous Vf vs color curve which I'd expect there'd be. The manufacturer specs don't indicate it. They say 2.4 volts Vf for red, orange, yellow, then 3.6 Vf for green, blue, etc., all at 20 mA If. I'd expect something like 2.4, 2.6, 2.8, and so forth.
What's the real deal? In particular I'm wondering what happens if I try to direct drive a yellow or green 5mm led from a CR123 at 3 volts. Thanks.
I'm wondering whether there's a continuous Vf vs color curve which I'd expect there'd be. The manufacturer specs don't indicate it. They say 2.4 volts Vf for red, orange, yellow, then 3.6 Vf for green, blue, etc., all at 20 mA If. I'd expect something like 2.4, 2.6, 2.8, and so forth.
What's the real deal? In particular I'm wondering what happens if I try to direct drive a yellow or green 5mm led from a CR123 at 3 volts. Thanks.