[pairodice]

You have my interest now in this subject: I tried setting my lights (not mounting them) on the concrete under the coach on the driver side and then viewing from the street (down a small 10' hill) and you could see the lights very well but they were not 'glowing' as you could still see the bulbs.  I noticed that the whole underside of the coach looks like it is foamed so not sure how to run the lights other than to make stainless hangers and maybe enclose in a plastic tube.  If someone makes a diffuser 'tube' then that might work better....