In article ,
Tony Quinn writes:
In message , Andrew Gabriel
writes
"Andy Champ" wrote in message
t.uk...
Lumme that stirred it up - and it was only the RF pollution I mentioned!

A couple of points guys on that long discussion:

Colour Temperature - the CFL is a lot closer to daylight for our
3-colour-sensor eyes than the old incandescent. I daresay people said

Daylight covers a wide range, from dawn (2100K), through to midday
(5600K), through to just before twilight (2100K). Incandescent (2700K)
is a damn good match for daylight at the time we need to start enhancing
light levels for our own comfort at home. What we in effect do in our homes
is stretch out the early evening period before twilight for which daylight
is 2700K way into the evening/night, both at the colour temperature and
comenserate lumen level (illumination level).

Colour Temperatures out of which textbook? I've seen exteriors at 8000K
at which Colour Temperature I needed gain in the camera.

Well, the sun isn't that hot. You can get colour temperatures that
high by filtering out the direct sunlight which has more of the red
components (e.g. in the shade), and just using the blue light
scattered in the atmosphere (i.e. the blue sky). Generally when
people talk of midday colour temperature, it's the average across
the sky, but the splitting of the red and blue by the atmosphere
can make it much more complicated when the object being illuminated
can't see all of the sky.

--
Andrew Gabriel
[email address is not usable -- followup in the newsgroup]