There is no bio hazard in a broken LED lamp +Gary Brisson
. +Camille Shim-Marinos
Lamp life is generally determined based on what they call "Rated Average Life", which means that they turn on a crap load of lamps and when half of them burn out, that's the average life of the lamp. This is usually the way the life of fluorescent lamps is determined. LEDs actually never burn out, they just lose light output after a while and need to be replaced.