about adjusting the b/w, a good way can be found here:
http://gellidius.deviantart.com/journal/check out this journal:Monitor Calibration for a few Dollars or Euros.
the quality of the results depend on you; i think the adjustments can be precise within 1 or 2 clicks of an excellent calibration done with pro equipment.
the only 6500K source that can be found in nature is on a winter day when there is complete cloud cover and snow everywhere on the ground, about 2 hours before noon, and 3 hours after noon; but this way is much more tricky than using the lamp.
the lamp can afterwards be used as a bias light behind the tv.
If you go at the above address, why don't you take some time to have a look at the image gallery from the same person:
http://gellidius.deviantart.com/gallery/just click on each thumbnail and then on each image to see them large size.
Last edited by J. Bellemare; 02/25/11 08:49 PM.