What is your favorite P60 drop infor single 18650 lights?

I just think these lights usually wind up about the perfect size for an EDC. Regardless of host, what is your preferred drop in and why? Do you have a favorite from one of CPF's awesome modders or did you once get a perfect setup from some distributor? Does it create a brilliant blue spot all the way across town or flood a meadow with warm natural light? Does it allow the single cell to run at low power for days or is it something unique, such as a brilliant green light that floods everything you can see but totally ruins your night vision. (I don't recall the Specific LED/driver but I do remember 530nm wavelength... it was like a pocket floodlight from a negative dimension that switched all the colors. Kinda cool but definitely not for general use.)

Also for anyone who may wish to go out and find your favorite setup to try it themselves...is it current drop in or a blast from the past?