old

Must admit I had never heard of this light source, but it was apparently an early competitor to the standard incandescent lamp around 1900. "Photonicinduction" apparently has a couple and refirbed one and then put it through it's paces! Pretty strange and operates without a vacuum, but requires...

Greetings!I am not a new member, strictly speaking. But, it's been over ten years since I was active here.I meandered back recently, and I miss this forum! I'd like to become active again! We'll see how much life allows =DSpeaking of old times; I felt quite warm and fuzzy when I found...