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c/mildlyinteresting · by bachatero@lemmy.world · 2y

This is what the insides of a high pressure sodium (HPS) light bulb look like

77 points · 3 comments · view on lemmy.world

3 Comments

lazylion_ca@lemmy.ca · 2 pts · 2y (1 reply)

How much pressure? Is the bulb pressurized or the smaller tube? Is it normal air or something specific like nitrogen?

SteveTech@programming.dev · 2 pts · 2y

I searched it up:

The Inside Structure Of The High Pressure Sodium Lamp

It seems the smaller tube is pressurised, the larger bulb is under a vacuum. Some of the other diagrams also show a getter in the bulb, so it's a proper vacuum tube level vacuum.

Galapagon@sh.itjust.works · 1 pts · 2y

"looks like an LED oh wait it's in front of the LED" thanks brain