Here in Ft Lauderdale, FL, more specifically Weston FL which is about 10 miles from the beach... Our Motorola bike league does a "night ride" during the day-lite-savings part of the year... From now for the next three months.

We use it specifically as a training tool... Because night vision reduces your response time we impose a speed limit of 20mph. To make it more work (and safer) we impose no drafting. We ride for about 24 miles (about 38k) on Mondays and Fridays. It is nice because it is cooler, there is less traffic and it is different than riding in the mornings. Also it is nice to just get out there and spin than be in a racing mode. We can talk and such as we do a rotation just to break the monotony (and allow the guys behind from having to stare at the blinking red light the entire night).

After the ride we all go to the local bar/pub and watch Monday Night football (the US kind)...

We start at 6:30PM which in South Florida is pitch dark these days.

We "REQUIRE" anyone in the group to use a 10W halogen front light and at least a 7-LED tail light. I use 30W halogen on the front and a battery 7-led light and a night-rider 18led 3W tail light.

I'm waiting for the HIDs to fall below $200 and then I'll probably switch to one of those for the front.

I also have a mountain bike that I use for commuting, though usually short, under 10 miles, which has basically the same setup. That bike I ride every night (except Monday and Wednesday)...

Here is a link to pics of my mountain bike (check the car horn!)

http://cyclemobility.org/CMFiles/nightriding.html