NEMA LSD 41-2012

Provides information about shipping and labeling of lamps that contain radioactive substances.

The vast majority of light bulbs, also called lamps by the lighting industry, do not contain any radioactive materials. Certain types contain very small amounts of radioactive isotopes which help to improve lamp ignition, lamp life and lumen maintenance. The radioactivity hazard posed by these lamps is negligible, and, conceptually is similar to the use of small levels of radioactive materials in smoke alarms and some watches.