I just found the ambers available (at "kiwilighting" of all places). Amber is used for "turtle safe" because they don't see that color and because they hatch out on the Florida beaches at moonrise and head toward the brightest bluest light they can see. Which ought to be the moon (moonlight is "sky blue" color). When CFLs and LEDs in "white" lights started to be used along the coast, the baby turtles headed toward them and died.
It's not just turtles -- people and algae and much else also use that same blue light sensitivity biologically -- to reset the body wake-up clock.
That's why "no blue" or "low blue" lights are used so much lately to treat insomnia.
Works for me and many of my friends. I make amber flashlights a lot. Very excited to find these XB-Ds available on 8mm, 10mm, 12mm boards along with the larger sizes.