[eimrine]

Cudos to Netherlands riders! I've heard of insanely good design of your bicycles, compared to rest of the world. Don't you have a coaster brake hubs? What wheels/tires are the most common in your country?

And do not confuse an arc lamp with fictional light sources, despite of the starting arc light is really doing that kind of impression you have described.

[the_third_wave]

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?

[eimrine]

Thank you for the answer with numbers, as another lifetime rider I consider wheels as the most important part of the bicycle and Youtube bloggers I have seen do not tell much information about wheel sizes.

I use MHL at kitchen because it makes food to look delicious and also at my workshop because sometimes I do some paint work. But a friend of mine uses MHL on growing phase and Sodium lamps while flowering because a proper use of LED requires a lens and sometimes even an active cooling.