Originally Posted by msbarnes
Light comes in different flavors that range from warm to cool, or to be a little more correct, wavelengths that correspond from red-ish to blue-ish. It is measured in something called kelvin degrees. Warmer light, like that from candles, old school tungsten light bulbs, quartz halogen, and golden reflectors, are on the warm, red/ orange end of things. Daylight, flash, arc lights, cool fluorescents, etc are on the blue end. Most black and white film is less sensitive to warm red-ish light than it is to cool blue-ish light. This is called spectral sensitivity. For some films this curve has been published and for some you've got to test or guess, but usually it's from 1/2 to 1 stop less sensitive. Since negative film enjoys over exposure much more than under exposure, I just call it one stop open up one when my key source is warm.
In regards to perspective, yes, that is what I mean, but that is a matter of taste. If that was your intention, you did a good job. If it wasn't, well, something else to consider.
In regard to lighting, yes, old farts like me express contrasts as ratios of key to fill in stops.
It's fun to play around, it is a good way to learn certain things. Certain other things are learned by setting out to do something deliberate and figuring out how. Once you can do that, playing around becomes much more powerful, because you know how to take full advantage.