I have a Sidewinder. While it is a pretty neat little utility light, the colored LED's are among the worst I've ever seen as far as beam artifacts are concerned. In addition, mine has a problem where it "flickers" or "pulses" on the lowest 2 levels. I shipped the light back to StreamLight for repairs, and after they had it for over three weeks, they shipped it back to me with a little tag on it that said, "no trouble found" on one side, and, "I agree...functions good" on the other side. To make a long story short, the light STILL pulses on the lowest two levels...and it's not something you have to "strain" to see. All you have to do is take it in a dark room and shine it on a wall to see the problem. They obviously didn't try that. So much for SL's customer service...
PJD
...one more thing: the flickering isn't a battery issue. The light does it with NiMH's, Alkies, and lithium cells.