My dynamo lights are bright enough for me. Are they bright enough for you? I don't know, but if you ride at 15 mph or less, there's a good chance. I put my lights together for $160, which isn't cheap, but it's not insane, either. I've been using them for over three years, and I have had only two small problems. One is that a wire to the tail light came out, so I put it back in. The other was that a vandal twisted the headlight's mounting bracket in trying to steal the light. He failed to steal the light. I bent the bracket back into shape, and it's been fine since then.

Here is my article on my setup on my Bianchi. My Raleigh has a B&M light that I like better, but this Philips is good enough for me.

I have a couple of bikes I don't ride in the dark frequently, so I equipped them with antique sidewall dynamos which I bought cheap on ebay. PLUS: They are lightweight and easy to install. MINUS: They create more drag than a dynamo hub, and they make noise.

You can now get a complete front wheel with a dynamo hub for $100, which is an irresistible deal. I have one of these on another bike, and it works flawlessly.