I have Luminlays in my Starfire and they are very hit or miss. The real factor is whether the stage lights are sufficient to recharge the dots. Of course, charging with the little flashlight is ineffective to give you a charge for a whole set, but whatever the bigger stages use for lights work pretty well, as the dots recharge when the lights hit it and then glow when it gets darker. Cheaper LED light rigs don't seem to do it. However, even when they aren't glowing, they are reasonably visible.
My experience is that sometimes I forget they are there and then find myself on a stage with a good lighting rig and am pleasantly surprised. Real LEDs would be great, but I'm not quite ready to drop the coin for the fingerboard replacement, etc., although I need to do it because my frets are not quite in the wrong place, so I might as well do the whole thing.
