Interesting. Would definitely look cool, but I'm pretty adamant about not doing anything electronic. Honestly, if you can't see the device, it's probably too dark to see the bucket. If you have lights on your rollover bar, that should be plenty.Which brings up a potential addition to the level. Maybe a light inside with a highlighted zero might be worthwhile.
My post was more a statement about useful size and the fact that I could use it without benefit of glasses and the sunlight induced pinhole camera effect.