Warmer is better to a point; I have an old Surefire 6P incan that's very bright but actually a bit too yellow. I have two different Malkoff M61 LED dropins that I alternate in it. One is around 4000k and is very bright. The other uses the fabled Nichia 219b and is extremely close to daylight in color but only 150 lumens or so.
_________________________
“I'd rather have questions that cannot be answered than answers that can't be questioned.” —Richard Feynman