I've taken apart a lot of stuff over the years, but I think this Epson printer front panel might be the only time I've ever seen reverse mounted SMD LEDs used like this.
Usually this is the kind of thing you'd see in a hacker conference badge, which is making me wonder who got the idea from who...
@tomnardi
Bleed between adjacent LEDs is masked by the PCB => less complex injection moulding design.