Incandescent lamp gas fill

[Robby]

what is the exact composition of GE light bulbs gas fill?

[Shekina]

the original edison lamp afaik is vacuum while modern lamps contain xenon, argon and other noble gas.

[Cereza]

some cheaper chinese low quality lamps use Nitrogen instead of Argon. Nitrogen is 10X cheaper than argon.

[nieto]

I thought it was hard vacuum he he he.

[amette]

Argon gas i think.

[aches]

some cheaper chinese low quality lamps use Nitrogen instead of Argon. Nitrogen is 10X cheaper than argon.

Nitrogen could kill the lam in just a few hours.

[Powerlab]

I thought it was hard vacuum he he he.

With hard vacuum, tungsten will evaporate quickly leaving very thin wire, and heavily coated glass surface inside.