Mine, either. I've been driving and spotted a Planet Bike Superflash (obviously I didn't know the brand until I caught up with the rider) from at least a half mile down the road, driving into a morning sunrise. I saw that light way before I could see what it was attached to, and before I could have seen hi-viz gear.

My rear blinkies are brighter than a Superflash. There aren't any guarantees but they help the odds of being noticed.