My current project is one of electrical rather then plastic. I have seen christmas lights since I was born, and never even thought of the idea until just recently. I cut the lights off the string, leaving a small length of wire on each end. I then cut a piece of styrene to create a cowl with a diameter at the small end just large enough to wrap around the base of the christmas light, I then glued a piece of aluminum foil inside the cowl to reflect the light as much as possible. All that was left was glueing(JB Welding) the cowl to the light and rewiring it to the plug....presto instant spotlight, just add some sort of base to it (I used sticky tac) and I can move it, angle it, and point it just about anywhere. I'm acually trying this for my layout right now. It brings out detailed pieces far better then the average lights do, is small enough for any scale, and is cheap to build...you can also use colored lights for special effects such as shining them in special places on a white backdrop to create a sun set...Just use yellows, reds, and blues....by moving the lights around you could probably come up with some really wicked effects...I found out the narrower the cowl the more concentrated the light is against an object...just something I thought I would share