I am searching for an led, but hopefully it'll match the specifics: - 1.5v, I doubt that one will happen, but the less v the better - MUST BE white - SMD or very small I have been searching for some time, but to no luck..
What's your application? It's not possible to have a 1.5V white LED, however, it is possible to drive a white LED from 1.5V with a small amount of circuitry.
Please elaborate on your application indeed. It's not hard to find a suitable LED with different forward voltage drops than you specified.