I've got a RHEM strip that I picked up on a course about managing colour. The strip has stripes on and depending on which stripes you can see, you're able to tell approx what colour light your bulbs are emitting.
Holding the RHEM strip under one of my energy saving bulbs produces an effect close to a fluorescent cool white light. But then I've had this bulb for a few years and it's used most nights so it could have changed emmissions over time.
I should just stick to a tungsten bulb for the pre-set WB and perhaps experiment with the energy saving ones in Part B or C.
Lisa.
-------------------- wollemi - 'look around you, keep your eyes open and watch out' (Australian aboriginal word)