Hi George, really glad you like the model, and as for the nav lights, each housing was first painted RLM02, then the red and green bulbs were added. Once these were dry a thin black wash was carefully built-up around each coloured bulb and the outer edges of each light housing all the while, carefully trying to match my photo reference. When this was dry each light was given several coats of clear gloss. Reproducing the look of the pics was a bit of a challenge but the results , I think, are very pleasing.