As far as I can see from distributors, most white LEDs today are using a blue light emitter, so there's no issue with UV. When using white LEDs that use an UV emitter, some glass covering is needed to catch the remainder, from what I've heard from a friend (I've never actually built an LED lamp myself). But it appears that blue LEDs are much more efficient than UV ones and that probably explains why normally white LEDs use blue emitters.
PS. I've been looking into these things to some extent because of all the issues with commercial LED lamps (short life, AC or PWM flickering, colour rendering), and have been thinking of mixing more LEDs together (various single colour ones together with various phosphor-employing ones) so as to mix a more ideal spectrum myself, but I haven't gotten around to actually executing that plan.
As far as I can see from distributors, most white LEDs today are using a blue light emitter, so there's no issue with UV. When using white LEDs that use an UV emitter, some glass covering is needed to catch the remainder, from what I've heard from a friend (I've never actually built an LED lamp myself). But it appears that blue LEDs are much more efficient than UV ones and that probably explains why normally white LEDs use blue emitters.
More information here (confirming what I just wrote): https://en.wikipedia.org/wiki/Light-emitting_diode#White
PS. I've been looking into these things to some extent because of all the issues with commercial LED lamps (short life, AC or PWM flickering, colour rendering), and have been thinking of mixing more LEDs together (various single colour ones together with various phosphor-employing ones) so as to mix a more ideal spectrum myself, but I haven't gotten around to actually executing that plan.