No its not only us. I met many service people (janitors, etc) that first were excited about lighting upgrades - Save Electricity ! 10 years without maintenance !.... And after a year or two were allready wishing to have the old lighting back, where they only ever had to replace lamps and starters, but not complete expensive lanterns

No its not only us. I met many service people (janitors, etc) that first were excited about lighting upgrades - Save Electricity ! 10 years without maintenance !.... And after a year or two were allready wishing to have the old lighting back, where they only ever had to replace lamps and starters, but not complete expensive lanterns

It all has to do with what lamp you replace it with:
Cheap LED: "I want my Cool Green back!  "
Good LED: "WOW! I'm saving so much money, And it looks just like the old light!"

They would not be saving anywhere near "so much money" even with a "good" LED, unless the old lighting system was really incredibly inefficient in the 1st place (as in asinine-bad optics), or unless they compromise on lighting levels, light distribution, or both

Fluorescent and HID (even the low end types) are simply good enough as they are, to not leave much headroom for LEDs to be better. Even with quite significant Lm/W advantage to LEDs, the LEDs easily lose in the overall performance due to worse optics and light spectrum

They would not be saving anywhere near "so much money" even with a "good" LED, unless the old lighting system was really incredibly inefficient in the 1st place (as in asinine-bad optics), or unless they compromise on lighting levels, light distribution, or both

Fluorescent and HID (even the low end types) are simply good enough as they are, to not leave much headroom for LEDs to be better. Even with quite significant Lm/W advantage to LEDs, the LEDs easily lose in the overall performance due to worse optics and light spectrum

I'm talking about the stereotypical home replacement, Incandescent to LED.
If I had a HID fixture, I would never replace it with LED.

I was about places that are FL and HID

But even in the home case, imagine how many homes will be switching to LED ? And now how many of them still use incandescents at all ? i'd guess most are CFLs by now, which again brings them to a much better starting point in regards to efficiency

I was about places that are FL and HID

But even in the home case, imagine how many homes will be switching to LED ? And now how many of them still use incandescents at all ? i'd guess most are CFLs by now, which again brings them to a much better starting point in regards to efficiency

Then it would not make much sense to convert to LED.

FYI a probe-start metal halide ballast will run an MV lamp of the same wattage. They used to tell you that on the label, but they're no longer allowed to. So you can still make an MV fixture that's 175w or higher using new, off-the-shelf parts.

Also, here's a list of psmh ballast compatibility:
35/39=50w merc
50=75w merc
70=100w merc
100w=125w merc
125=125/175w merc
150/175=175w merc
Etc...

But you have to disconnect the ignitor when running an MV lamp on a pulse start MH ballast.

This isn't making much sense:
MV ballasts are banned, But PSMH is not.
PSMH can run MV.
The fact that PSMH can run MV makes the ban useless.
Also, What about MV induction? Essentially an induction lamp but with MV technology.

This does. Many places are institutions, and won't mess with lanterns to make them run other type of lamp. Also, if you mess with the lantern you void its UL approval, which may not bother you too much but it does bother whoever is bound by policies

This does. Many places are institutions, and won't mess with lanterns to make them run other type of lamp. Also, if you mess with the lantern you void its UL approval, which may not bother you too much but it does bother whoever is bound by policies

What does? I don't see the link.
And how do you do it?

There is no link. My "This" is same as your "This" in the post above

Officially, you cant do any changes inside the "appliance" (which the lantern is), without voiding its UL approval. Nobody cares if you do this in your home (unless you call in an inspection, or unless you have a fire - not related to the converted lantern - but the insurance company sends in inspector to find any possible excuse to deny insurance money). Institutions, companies, power companies, councils and so on do care and will avoid doing such things

Officially, you cant do any changes inside the "appliance" (which the lantern is), without voiding its UL approval. Nobody cares if you do this in your home (unless you call in an inspection, or unless you have a fire - not related to the converted lantern - but the insurance company sends in inspector to find any possible excuse to deny insurance money). Institutions, companies, power companies, councils and so on do care and will avoid doing such things

Those insurance companies will do anything to keep as much money as possible.

Also, What about MV induction? Essentially an induction lamp but with MV technology.

What is supposed to be that?
The hot electrodes are the most efficient way known to feed the arc (only suffers from principal limited life and that is the only reason for the induction to exist at all; but the MV technology itself allows already quite decent electrode life). And even with that the MV's are quite short in efficacy compare to the other lamps, so when induction fed, it would be even way worse.
The induction get rids of the electrodes, but the only efficacy benefit from that wold be "to free your hands" in choosing other gas mixtures, more efficient in emitting light (but not usable with electrodes because chemically attacking them). That is the only way the induction may exceed the efficacy of a metallic electrode lamp, but then we are talking about whatever, but not about MV.