Thank you, you've got a nice group of lights yourself.
The violet lights are a 'limited' edition called the WineLights. E1 and E2-W lights. They're standard E1 and E2E lights, sold with the low output bulbs and anodized in a special color. The knurling feels a bit less aggressive, too. The story I heard on them is as follows:
A Surefire executive, or friend of an executive, was a wine connoisseur. Part of enjoying a good wine, from what I understand, is the color and in some establishments the lighting is rather low, making it hard to fully appreciate the wine. As a result, the individual began carrying an Executive series flashlight with which to examine the color if the drink. He grew weary of carrying the OD green, hard anodized E series, so a 'special' run of WineLights were produced.
The story could be a complete fabrication, but that's what I've always heard. I don't think they sold especially well, because a while back a vendor sold a set of the two lights for an incredible value. Now, they're not quite 'common', but I don't believe that they're especially rare. Kind of cool, though. There's a specific Winelight display out there that has the Surefire logo on a wine bottle, and a space for each of the two lights. I'd love to find one.