Sorry for my first botched attempt at posting images here. Doh! This is what I meant to say/show the first time:
I recently bought a Dark Standard Issue w/ vertical grooves in Sentinel Yellow/Ultra Edge, and I absolutely love it! The SY is a beautiful color, and it lends itself to some really neat color changing opportunities with filters. I'm posting a few shots of the different colors for anyone who might be interested...
This is a daylight shot of the hilt with SY.
Here is SY in the dark. It is actually a bit more yellow than it appears in the pic. Mine is a warmer yellow close to the hilt, fading to a cooler yellow at the top (but it is a slight fade with a beautiful effect).
Here is the SY with a green filter:
Orange filter:
Red filter:
I hope this is helpful to anyone considering sentinel yellow.