Missing from this list are some historical and modern sources. This EPA page has a better list https://www.epa.gov/radiation/what-kinds-consumer-products-conta

Missing from this list are some historical and modern sources. This EPA page has a better list https://www.epa.gov/radiation/what-kinds-consumer-products-contain-radioactive-materials https://www.epa.gov/radiation/what-kinds-consumer-products-c... Missing from both is radioactive electronics. In lamps, electron sources, spark gaps, it's common to use radioactive materials to make ionization easier. In a lamp for example this would make it start at lower voltage https://instructional-resources.physics.uiowa.edu/demos/7d3046-fluorescent-lights-radioactive-starter-ballasts https://instructional-resources.physics.uiowa.edu/demos/7d30... https://www.orau.org/ptp/collection/consumer%20products/electrontubes.htm https://www.orau.org/ptp/collection/consumer%20products/elec...