Sylvania ULX150/D high pressure sodium retrofit lamp running in AEL R175M yardblaster security light 

@@homeguestunton True. These coated retrofit lamps are especially rare too.

@@worldwidehidcollectorusa3519 All coated HPS is rare. When I see a coated HID lamp I always think MH or mercury vapor, and they almost always are either metal halide or mercury vapor, when the lamps are coated.

@@homeguestunton In other countries, I have seen that coated high pressure sodium lamps are more common especially European countries. In those countries, coated high pressure sodium lamps seem to be available in 50W, 70W, 100W, 150W, 250W, 400W, and even 1000W. Additionally, I have seen that Japan seems to have a relatively even balance of coated and clear high pressure sodium lamps that typically include retrofit lamps for mercury vapor ballasts ranging from 75W to replace 80W mercury vapor lamps, 180W to replace 200W mercury vapor lamps, 220W to replace 250W mercury vapor lamps, 270W to replace 300W mercury vapor lamps, 360W to replace 400W mercury vapor lamps, 660W to replace 700W mercury vapor lamps, and 940W to replace 1000W mercury vapor lamps, plus self igniting 70W and 110W lamps that require dedicated ballasts. The thing about 200W and 300W mercury vapor lamps is that they are largely unique to Japan and not really used anywhere else in the world.

@@worldwidehidcollectorusa3519 I meant they are rare in America, I’ve only been to America and I live in America. Almost all HPS lights I’ve seen are clear. Almost all coated lamps mean metal halide or mercury vapor in the US. If I see any coated HID bulb, it is probably either MH or mercury vapor. I think coated HIS might be common in Europe, Japan, and more countries. They might be common even in places like Mexico.

@@worldwidehidcollectorusa3519 I’ve only seen two HPS coated so far working, both I think in wall packs