On Thu, 10 Jan 2008 07:56:46 +0000, Si $3o&m wrote:

You presumably have measured this Peter. My human experience of dimming
my 70W CFL is that the colour balance is reddish when first switched on,
becomes more neutral as it warm up, and having got to temp' doesn't
change as it's dimmed.

No, it was from "Lighting" magazine which tested about a dozen
different types and reported on it a month ago. I'll see if I still
have the copy around.