@Lcubed3 - Yes, WSDOT has not yet issued a complete LED conversion, which is cool. I'm guessing as the HPS luminaires die, they'll just get spot-replaced.

Yes and no!, I grew up with predominantly SOX, it was these that spurred my interest in street lighting, so I miss that, we only went with SON here on the A roads, with one or two spot replacements in and amongst the SOX, although granted, the bulk SON installations were brighter than the SOX

With the LED installed though, it was also nice to go back to the white light of the early 70s😎

Ofcourse.

But it still exists here so its not like i cant go dowm the street and see some mercs and sodiums in action. The only technology that is basically extinct here now is metal halide. Aside from stadium lights and large factories. And a couple store parkinglots. And some interior factory and store lighting.

In 10 years im sure it will be virtually gone. Honestly at this point in life i got greater things to worry about and i cant control the march of LED in any major extent. I can control it partially at my places of employment and home. And I make sure of it.

Okay, so for me HPS is a bit of a double-edged sword. I think it's more effective at lighting major expressways and thoroughfares (especially in the rain), but MV/LED are far superior in every other application. Residential areas should[/b] be white or at least some form of white in color– things look kind of drab and even apocalyptic in the 2100K of HPS.

So, for me, the personal preference is to keep older mercury fixtures alive through retrofits (think the GE PowrDoor), and to keep expressways and major thoroughfares LED-free. Unfortunately, however, my opinion means diddly squat, so I guess I just have to learn to adapt to the harsh light of 4000K-5000K freeway LEDs. It was good while it lasted, however. Philadelphia only started going LED in 2023/2024, which is far later than nearly every city across the country.