@DaJa-rahrah
Wouldn't that depend on how opaque the plastic lens is though? I mean, yes, there are dim LEDs out there, but I'd say LEDs are usually perceived to be bright (heck, people are hacking their devices nowadays, just to disable annoying LEDs at night). Well, at least "dim" isn't the first thing that comes to mind when talking LED. Then again, i might have been thinking about LED lamps, and they are usually not a single LED, but an array of LEDs, so they are usually brighter.
Still, I'd say author just when with a modern light bulb replacement, and used a recognizable image for LED, no need to think too deep about this.