I was just given an Aristo 5x7 cold light head (and enlarger). I've never used one before and have only seen the variable contrast Zone VI heads with all the Zone VI wiz-bang gadgets that came with it. This head only has 1 color tube (looks like daylight to me) and didn't come with any voltage/intensity regulators or anything else.
1) There are 2 cords that come out of the head. 2-prong and 3-prong. The 2-prong turns the light on. I think the 3-prong turns on a heater inside the head. If this is the case, do I need to use one of those enlarger timers with a probe (like a MetroLux) to ensure accurate exposure?
2) It was mentioned on the LF forum that the light might be "blue" and print higher contrast on VC paper. The company that now offeres replacement Aristo tubes says that the 5x7 bulbs are "daylight balanced." Does this count as "blue" (I guess it is when compared to tungsten bulbs)? Do I need to filter the light in addition to using an Ilford/Kodak filter pack to make a "soft" less contrasty print?