One problem in searching for LED is that you get 38,000 LED Zeppelin resopnses and only a few hundred LED listings. It was worth it since I discovered something I did not know existed. Response from 440-650 nm.
All listings below are for the half max range.
I guess they have packaged a blue LED with a phosphor. One at 520-545 and another at 680 to 840. I am yet to find anything between 680 and 840 though. I guess I just like the way I can drive them. By varying the number of pulses one can do a very nice linearity test.