I thought I'd share my results from converting to incandescent to Comet 5050 Cool White LEDs. These are photos taken from my Nikon D80 in RAW mode. I didn't may any changes other than cropping so what you're seeing is right off the sensor.
Incandescent (actually a few LEDs in the top left corner)
The end result ended up surprisingly less blue than I thought. It's also a first pass. I wanted something that was a good place to start that I could work on as needed. I know lots of folks tend to use colored LEDs for various parts of the artwork and I plan on doing that too.
Overall though, I like it!