Not to muddy up the water any more on the rain light issue but some of the models of bicycle lights Ive gone to look at simply arent going to hold up due to quality and lack of true weather proof. The stand alone clearance lights and led type will probably work just fine but just seemed like they also could have issues with easy replacement after a get off. So I went and started researching purpose built lights and everything come out of the UK it seems but one stood out at me so I did some research and came up with the Borealis Safetylight. This is purpose built fully contained vibration and waterproof, and is FIM approved and fully ACU compliant as well as has a aerodynamic design. I know, I know it cost a bit more than other products but the ease of install and design I feel it is worth it. I have been in contact with John from Anode Electronics and wow what a great guy. John is excited to get something going with us as we are his target market. At this time there is no US distibutor but I am going to be putting a couple people together with John to try to get these readily available here in the US. He has also informed me that if you are interested he can get them to you in time for Houston. I should have mine soon and they will be on the bike at Houston in case anyone is interested in seeing them in person. There is both rechargable battery powered options as well as hard wired depending on your wishes.
http://www.borealis-safetylight.com/
Just another great option
Michael