Not to be argumentative ( Just my opinion ) but for day riding I wouldn't think a steady lamp would make you more visible than a blinking lamp. Depends on the lamps though. I've seen some Pi** poor blinkies and some sad steady lamps as well. I feel you when you mention the threat of being doored. I never ride closer than 4ft to any car parked on the side of the road when I ride. My bet is that if you used a bright blinking light ( > 100 lumen ), it would be just as or more visible than a standard steady light using twice the output. I don't speak for everyone but when I'm behind the wheel ( doing my job ) it's the flashing lights that always catch my attention first.