This is what the insides of a high pressure sodium (HPS) light bulb look like
This is what the insides of a high pressure sodium (HPS) light bulb look like
3
comments
How much pressure? Is the bulb pressurized or the smaller tube? Is it normal air or something specific like nitrogen?
2I searched it up:
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.
2
"looks like an LED oh wait it's in front of the LED" thanks brain
1