You see that MASSIVE BLUE SPIKE? That's the problem - the blue overwhelms everything, and, while a halogen light isn't "daylight" (heck, "daylight" isn't "daylight" - it changes throughout the day, the reality is that the color PERCEPTION (I don't care what color meters say) is very, very wrong with most LED lamps - including the 5W Luxeons we tried, that were specifically designed to prevent backscatter and all that (these were firefighter-specific bulbs).

There are studies about the color perception issue:
http://people.csail.mit.edu/unamay/publications-dir/lro.pdf

Also, terrain visibility is an issue, and this article touches upon it:
http://caves.org.uk/led/led-myths.html#compare

There are numerous articles in here about the "true white" issue:
http://www.ledjournal.com/led_whitepapers.htm

I personally own a lot of LED flashlights, I have tried, several times, to introduce LED lighting into my home, without success because of the horrid color quality of the LED lights.

While I'm on that subject, I only recently was allowed to move Compact Floros out of the basement and into (limited) use in the living areas of the house. Currently, because my wife is very, very sensitive to the color rendition of CFL's, they are banned from the Bedrooms, Bathrooms and KItchen. However, they are now in the hallways, garage and in the living room. We don't use them in any dimmable situations, because the dimmable CFL's are a)terrible and b)expensive

Anyway, I know we all like the LED's here, but I thought it interesting that I was also on the "let's not use these for fire calls" side. We only had 2 members who felt that the LED's were OK for real calls.