Wanted OSRAM FLUORA classic NOT LED. Wattage is not important. I want few pieces. If available notify me. I can send some HELVAR ballasts 36W magnetic or some other lamps/things. Thanks. Also Philips tubes can be in any wattage in WORKING state. Message me for more info.

The worst I have had was some Amazon special LED deformable garage light. It lasted for about two years until it overheated to the point where the plastic diode lens panels started melting. Destroying that thing was the best thing that ever happened to it. Found a replacement at Costco that's held up far better.

There might be a way to constrict the plasma to keep it away from the arctube wall. BUT it would be OVERCOMPLICATED just like this crazy charade around lighting with microwaves.

But I bet as they start to add reactive halide salts they won't reach arctube lifetimes above what is seen on ceramic metal halide lamps. That is, some 20-30K hours. So why messing with shielding, magnetrons, fans, all that crap still to get the performance significantly below of off-the-shelf 400W or 250W CMH lamps of recent years? Okay even if you are much loved by friendly folks at US Department of Energy

You could probably use UV test cards to test your glasses.

I think it’s option 2…

A short circuit somewhere on the power line? Can cause RCD trip especially with some MOVs between line/neutral and ground connected downstream.

We of course are not talking about some classified weapons, don't we? 

For sure, it is not the brightest idea to use some random glass for critical UV protection. But I believe to block 254nm UVC completely just a little amount of impurities is necessary, much below the quantity that causes a visible tint. But, when measured thoroughly, many kinds of glass leak certain amount of UVB. Fortunately, not as dangerous wavelengths as 254nm UVC, though still not advisable for prolonged exposure.

 

That is a good question

How do we experiment with the glass in question between UVC transmitter and the known UVC excitable material?

I think so? I don't remember tbh.