I rarely peruse Candlepower Forums, but today, I see that some CPFers had the same idea as me--Energizer Quick Switch with an LED replacement bulb. In this case, they're using the highly regarded SMJLED replacement bulb. There are some great beamshots of the Quick Switch versus a couple other flashlights in
this thread, although only flashaholics would have any idea what the other flashlights were--"...Fenix L1P, and Milky-fied Pimped Q3". Compared to your typical incandescent 2D flashlight from some big box store, the Quick Switch/SMJLED would probably look a lot better in comparison.
The purle tint is a bit surprising, but it's probably not that noticeable in real use. Even so, that's a characteristic of this particular SMJLED and not the flashlight itself. The beam is "ringy" but bright, and again, it might not be so noticeable in real use. These CPF guys seem to also love the battery flexibility and long runtime that this combo provides, so I'm not the only one.
Anyway, for those people who have enough disclipline to keep a decent stock of fresh batteries on hand, there are many better flashlights out there than the Quick Switch. But I still think the battery flexibility aspect makes this flashlight something you might want to have at least one of in your emergency kit. You never know. You may lose, give away, or somehow run out of your extra batteries. If you did need to go out and try and scrounge more batteries, you have seriously increased your possibilities with the Quick Switch. And with the LED, even batteries that others consider "dead" because they barely make their incandescent flashlights glow a dim orange can provide usable light with an LED. Anyway, just another lighting option.