On one of my bikes I run 2 Planet bike Superflash blinkies. Plenty bright, on my other commuter I run a single PBSF and the tailight from MagicShine. That sucker is bright for sure. I also ride with a vest with two rows of red blinking lights on reflective material. Never had a problem being seen and have had several drivers remark how cool it was to be able to see a cyclist in the morning.
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(Life is too short to play crappy guitars) 2006 Raleigh Cadent 3.0, 1977 Schwinn Volare, 2010 Windsor tourist. ( I didn't fall , I attacked the floor)