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TransitBiker I think a rear blinky in addition to solid lights is nice. I was in fairly heavy traffic last night (30 minutes after sunset) with rain and glare it was almost impossible to discern car and bike tail lights. There was a fellow several blocks ahead with a blinky, it made it easy to spot him and know that he was something different than normal traffic.
I personally use two solid lights and one blink on my ride in to dark and drivers seem to see me and give me a wider than normal berth when passing.
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noglider What is this diffuser like? I am intrigued.