Hi there. I'm not sure how uncomfortable it might be for you, but I just bought a headlamp for my tour. I bought it for mainly off-the-bike stuff but can see that it may just come in handy should I have to ride at night.
http://www.shopping.com/xPO-Princeto..._Quad_Headlamp

Also, if you want a noticeable tail light, I just bought this:
http://ecom1.planetbike.com/3034.html I practically blinded myself when testing it out in the dark.