Strobe & Speedlight are to flash what Kleenex are to facial tissues: they are brand names which have become used in some circles as universal names. Some peopl

Strobe & Speedlight are to flash what Kleenex are to facial tissues: they are brand names which have become used in some circles as universal names. Some people will discriminate between "strobe" and "flash" based on cycle times and power source, e.g.: a "strobe" will be a mains-powered flash system that can keep flashing as fast as you can trigger the shutter while a "flash" will be a camera-mounted, battery-powered thing that takes several seconds to recharge. But in the specific example above, the author is using strobe as a synonym to flash.