Yes, coaster brake hubs - "terugtraprem" in Dutch - are standard on the more traditional bikes. Those tend to run on 28"x1½" (40-635) tyres. The most common size is 28x1⅝x1⅜ (37-622).
As to arc lights that quote is somewhat - but not entirely - tongue in cheek. There is a metal-halide lamp in most video projectors (except for the more modern LED-equipped versions) and they're there for a reason, this being their wide colour spectrum. They do have quite a few disadvantages though ranging from their often relatively short life (in projector applications around 1500 hours) through the potential for self-destruction - older lamps run at higher currents and temperatures which eventually can lead to explosions - to the copious amount of heat they produce and the long startup time. Do you have a reef aquarium or do you use them as grow lights?
