Originally Posted by
bikenh
I don't turn the light on during the day since until you are close to make any kind of move you won't see the light in the first place. Try it sometime you will be amazed at how close you have to be to the cyclist during broad daylight to see the light. During the night I use both blinky mode on the front and the back.
This hasn't been my experience with blinking lights during daylight.