lazylion_ca, How much pressure? Is the bulb pressurized or the smaller tube? Is it normal air or something specific like nitrogen?
SteveTech, 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, “looks like an LED oh wait it’s in front of the LED” thanks brain
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