A little thing i discovered was that you can generally get more powerful light in the form of a compact flashlight (ex: fenix/cree torches) and just buy or make a simple/cheap mount. I got a Fenix E21 + a $5 mount on ebay which came out to $40 versus $130 for a similar powered bike specific headlight. Any taillight with multiple light patterns works well i think.
Night riding is fun with the right stuff...