[reuben]

Sorry for the late followup - the new house has been sucking up all of my time.

I've read the thread a few times, and sorta kinda narrowed down my preferences, but have a couple of unanswered questions.

Lumens - some people want 400-500, and yet I see a lot of lights, some mentioned in this thread, with 50-100 lumens. In the daytime it's hard for me to imagine that a 50-100 lumen light would be effective UNLESS it blinks.

Blinking - I'm a big fan of this. A steady state light can be easily overlooked by an inattentive driver.

Blinking frequency - Per a post in this thread at least one of the Varias changes blinking frequency as a car gets closer. Are there others like this?

Battery life - The Niterider Solas mentioned here emits 250 lumens but has only a 4 hour battery life in "fast" blinking mode (at full 250 lumens?). 4 hours isn't necessarily a lot of time. The Varia RTL515 boasts 16 hours in "day flash mode", apparently due to emitting 65 lumens in this mode, which doesn't sound like much in the daytime. The Varia RTL715 has the same specs.

Battery - internal rechargeable or external (coin, AA, AAA, etc.)?

Thanks.