I can't find any data on Osram site for classic Fluora and they are phasing out classic Lumilux tubes amongside 90CRI ones. In Serbia hardly to find but I will try and notify you.

Must be some kind of environmental thing, or due to the current conditions of the electrical grid. I have noticed the same, as well as how long preheat fluorescents take to start. When I start more than one at once, most times they can take a long time or a short time, but all are either fast or slow. They are especially slow in the first hour after a somewhat long power outage.

As for a flash that extinguishes MH lamps during warmup, I’ve only had it on a new GE 39w G12 and after about 30 starts, it now rarely flashes at all.

So this morning I had to do some mandatory work to The Genesis. (Had to empty out my oil catch cans, rearrange one oil catch can, and attach a new fuel
hose to that same catch can as well. Also had to refill the coolant in my radiator and reservoir tank.)
This required me to turn on my six Metal Halide 50w Wallpacks. (USA made GE HALARC 50w QMH.) When I turned them on, pretty much all of them (except for
the lone Caster 50w QMH) flashed violent reddish or violent orange during warm up, which is rare. Normally only one or two of them do this.
During installation of my new fuel hose to the oil catch can, I had to use a hair dryer to help expand that rubber hose, which... required me to shut off
my Metal Halides, since that hair dryer uses a lot of watts/amps. (Only one receptacle is in that garage.) After I was done, I unplugged the hair dryer
and fired up my Metal Halides again... same thing. Lots of brilliant reddish/orange flashing during warm up time.
After I was done with everything, I shut down the garage and went into my apartment. In my bedroom, I turned on my 20w CMH track lights, and my two GE
self ballasted PAR38's.
Although my 20w track lights warmed up without flashing, both my GE self ballasted PAR38's violently pink flashed, and one of them shut off during this,
and restriked a few minutes later.
So... what's up? Why so many brilliant flashes? This may be a dumb question, but does this have anything to do with environmental conditions?

I think Fluora tubes are still not rare today in 2026, just unpleasantly expensive. Look in some oddball European locations like Estonia. Graphica may be really hard to find.

 

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…