Another thing you can do to make them less obvious (when not lit) is to tink the lenses black.
These were originally pretty bright yellow/orange -
They don't stand out near as much, and you can go darker than I did (they look darker than this, the photo is a bit too light).
It will knock the intensity down some, depending on how dark you tint it, but they are still plenty noticeable IMO.
I've used auto spray tint, but that has become hard to find. Easiest to get, and pretty much the exact same, is Testor's-brand tint for plastic models.
You tint the lens on the inside. It dries quickly, but you still want to go very light or it will run into the low spots only. It's made to run, so it's pretty thin. Do a couple light coats and put it on to see the amount of darkening.