PhotoBlocker is an effective way to avoid those pesky red light camera traps. A simple, generous application of PhotoBlocker to your license plate will cause a “Flash Back” to any Red Light Camera Traps. As reported by WBAL in Baltimore, city officials are attempting to “trim” the grace period of Yellow lights, why, simple CASH, and they aren’t the only ones trying to dip their hands in your pocket from this trick. With all 50 state now utilizing Red light and Speed Cameras and the average cost of those tickets rising, tell me why YOU SHOULD NOT HAVE PHOTOBLOCKER? (1) 6 oz can is enough to cover 4 plates.