I don't believe it handles weather too well. I get much the same effect with strings of LED lights ( http://www.save-on-crafts.com/chrisligandl.html )
... tho' they say indoor only, I've been drenched and they survived

I have a planet bike 'insight' that is also being phased out so if you can find it it's cheap. They don't keep big lights in stock at my LBS 'cause so few people want them... but that meant I could ask and we got out catalogs and I looked at all the brands in the world and got good advice about them.

On my main commuter bike, though, I have a dynamo hub. Bright light, no batteries.