Nitrogen-filled light bulbs

The development of nitrogen-filled light bulbs reduced evaporation and extended their lifespan. Argon later replaced nitrogen for efficiency. The presence of gas also made the bulb less prone to shattering on impact, increasing safety.
 Irving Langmuir United States 1913 Nitrogen-filled light bulbs

The development of nitrogen-filled light bulbs reduced evaporation and extended their lifespan. Argon later replaced nitrogen for efficiency. The presence of gas also made the bulb less prone to shattering on impact, increasing safety.