Maintenance on a garden railway is a near constant task. A little while ago, some Belli-Beco lamps were installed. I'd have to say that the design is somewhat sub optimal for outdoor use, as one wire relies on loosely touching a metal sleeve to provide electrical continuity. Over the years this has often proved troublesome, and one lamp failed completely recently. Obviously, this was on the building with a sealed base... anyway, the dremel cut into it, and a new bulb was installed. We'll see how well this lasts, but here it is for now.