In fact, I recommend you get the cheapest bottle generator you can find. You can use it to decide if generator lights are for you. You can probably spend as little as $15, maybe less. Installation is quick and easy, and they are lightweight. If you want to go further and install a front wheel with a generator hub, your lights are already installed, and you just have to add the wheel. You can get 700c wheels with hub for as little as $100. I bought one of those from Intelligent Design Cycles (on ebay), and it is flawless, if slightly heavier than the higher priced wheels.