a led signal includes a housing and a cover . at least one led is arranged on a pcb and mounted within the housing . a collimator that collimates light energy emitted by the at least one led is positioned adjacent to the at least one led . a diffuser is positioned adjacent to the collimator and spreads collimated light transmitted through the collimator . the pcb , the collimator , and the diffuser are disposed between the cover and the housing , and the cover provides a protective barrier between environmental conditions and the collimator and diffuser .