When Thorwald enters, Jeff repeatedly sets off his camera flashbulbs, temporarily blinding him. Near the start, the song begins to make a beat of paparazzi's flashbulbs. Flashbulbs took longer to reach full brightness and burned for longer than electronic flashes. Later, magnesium filament was used in electrically ignited single-use photography flashbulbs. He used yard lights, flashbulbs or whatever lights were available. Affably, amidst the flashbulbs of photographers, Ormiston accepted his served warrant. Burning zirconium was used as a light source in some photographic flashbulbs. The photographs were taken with a 35 millimetre camera and infrared flashbulbs. Most current flash units are electronic, having evolved from single-use flashbulbs and flammable powders. Unlike flashbulbs, the intensity of an electronic flash can be adjusted on some units. Manufactured flashbulbs were first produced commercially in Germany in 1929.