Night riding is a staple for me. living in Florida one learns to enjoy it.
I use a cygolite 500 up front on the steady pulse mode, a 2w hot shot rear in pulse mode,
I have 6 of those single spoke reflectors on each wheel, have reflectors on my pedals
and wear reflective jerseys. I believe in over kill when it comes to night time visibility.

That's about what my Cygolite does on full brightness. It's at least 5 hours too few when riding all night. ;)

I use a L&M 650....same story.

I got one of these cheapo. It runs forever, it seems. I aim the L&M down the road on medium then use the little light on high to fill in maybe 30-50 feet aimed at the road. Don't know for sure, haven't really measured. Anyway, I'm comfortable with the bright area directly in front and the Urban is fine as far as I care to see on medium.

Results in further travels 'til blackout.

I've got about $100 in lights. Nothing ground-breaking and I think they've all been mentioned already.

A bright tail light is quite valuable. The sooner a motorist sees you, the sooner they are able to prepare for avoiding you.

What I learned a while back is the value of reflectivity. Almost every bicycle tail light on the market will be washed out by a car's headlights. And this is where reflectors and reflective materials on your bike and your person become useful. I have plenty of reflectors and reflective sickers on my bicycle, but my clothes are lacking in that regard.

The reflective vests I tried all blocked access to my rear jersey pockets, so I designed a reflective harness. I wear this anytime I'll be out in darkness. I've made several of these for other cyclists, also.

The Nathan vest is long in the back, like a good bike specific jacket. It has an opening that allows access to jersey pockets. One of the reasons that I still use it.