Yeah, Monkey Lights. 16 colors and 9 patterns, of which you can choose what you want displayed, and they're fully water and weather-proof. Great active side visibility, much better than just reflectors IMHO (although I do have a set of Lightweights reflectors that I've been meaning to put on the bike). Even when you're stopped, they're bright enough to be very eye catching; they have two brightness settings, and I only ever have them on low, because high is just overkill:



It was bright enough that night to ride without lights, but I thought it'd be neat to get a pic of my bike lights reflecting off the snow, so I pulled over and turned 'em on for what turned out to be a pretty crappy iPhone pic. Anyway, the spoke lights are on high in this pic, and the yellow and white are the brightest of the colors; the greens, blues, and purples are less intense.

I've had a lot of positive responses from motorists and pedestrians alike because of the lights. Motorists are much more likely to hang back at intersections, not creep at me as I cross in front of them, and sometimes wave even (which I get on neighborhood roads regardless, but it's weird to have people wave at you as you cross a major intersection in the middle of a business district). Peds just shout out, which is fun; just last night a group of teens all started yelling at me to "go faster!" as I passed by the downtown transit center, so I did, and they let out with a bunch of "hell yeah!"s and "WOOOOO!"s.

Downsides are the weight (they take three AA batteries each, and you can feel the batteries rolling around the wheel if you only mount one light, so I mounted two; better balance, but double the weight), a bit of increased wind resistance in cross winds (the front wheel wants to deflect and turn), and the fact that they're not street legal (I've heard of people being told by the police to turn them off). Cops around here don't care (I've had one ask me where I got them and how much they cost, and that's all the police attention I've had), and if they did then I would just run them on yellow and white only with one of the more neutral patterns (it's mainly the non-standard colors that are illegal, I think), but depending on where you are they might garner some unwanted attention.

I'm probably going to sell mine as soon as the newer, smaller version comes out; the Mini Monkey. They moved the battery mount to the hub, and the light board is 1/3 the size. There are fewer lights, so the display is smaller and less impressive, which is fine by me; as neat as it is to be a rolling techno-light display, all I really want is for people to not run me over from the side or hook me, and the Mini seems like a less obnoxious way to accomplish that.