I had another play with my halo-lit sign for the house this weekend - I live on a mostly unlit, unnumbered road, and the sign for the house is a very small plaque - I think I have the winning cominbation of shiny bits and LEDs. Cranking up the LEDs from 8mcd (before) to 1500mcd (now), makes the sign bright enough that you can see it dim light, which was the aim. I might try the ultra-mega-hyper-bright LEDs (8000mcd), just to see how bright they make it, but they are a bit more expensive, and I’m going to need to get 80 or so, so it’ll make a difference. The final design will probably be green, not red, since it was pointed out that having a red-lit sign in the window might give the wrong impression.