Quote - Question for Paolo or our resident lighting expert: which light preset in Reality is best suited for a halogen bulb (spotlight)? If there isn't one, what would the settings be for such a light?

Since it's a bulb I would use a mesh light scaled way down and made narrow, instead of square. Scale it to real size. I would then set the color temperature to a be a bit cooler than a light bulb, probably around 3400K . Hard to know until you try but that should be a good start. Here is a chart from the good people at Lowel:

http://www.lowel.com/edu/color_temperature_and_rendering_demystified.html

Cheers.

Paolo

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