I'll have to check my rear light. It's a Superflash so I really doubt it's bright enough to cause problems, but I'll send one of my boys out at dusk and follow in the car. Helmet light is pretty dim too, it's just a "be seen" at dusk. No night riding for me yet, don't have a headlight.
What I hate is the police flashers on my way home from work at 1:00 AM. Even on lit freeways I'm totally blinded.
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Disclaimer: 99% of what I know about cycling I learned on BF. That would make, ummm, 1% experience. And a lot of posts.