I went out for a little 10 mile joy ride tonight to break in the studs on my ice bike a bit more. It was about 4 degree F windchill, so nothing too cold. On dismounting at the end of the ride, I noticed one of my superflashes was dead. I normally keep the one of the seatpost steady, and the one on my rack flashing. Thankfully, I didn't have much to worry about since my other light was still blinking.
My question is: Is it worth the extra battery drain to go one steady and one blinkie? I normally carry extra batteries anyway, so if I noticed a light was out, I could replace the batteries. I heard that a solid light is better at perceiving depth, so that's why I started running one solid in the first place.