I use a few of them around the house, driven by standard
wall-plate residential dimmers.

Rheostats? Triacs? I'm not familiar with the current technology. (X-10 is
triac-controlled, I believe.)


As you say, the color temperature is very constant over a
usable range of intensities compared to incadescent PAR bulbs.

Actually, I didn't say that, but you'd expect it to be so, given that a
fluorescent lamp is a quantum device.


While they start pretty much on the dime, they do get about
50% brighter the first minute or two of operation.

That's what I noted with the Home Despot lamps. It was startling at first to
see a fluorescent lamp come on faster than an incandescent.