Originally Posted by mad_machine
You mention colour temps... 5700 is the temp of our sun.. anything below 5000k -should- be yellowish.. but as all things are you need to be below 4000k to really notice it.
I have used Superbright in a car with no detrimental effects. low power will not kill an LED, but too much will shorten it's life.
I go by my own experience which is that anything over 3000 is too white, I emphasise for my liking.