This light wasn't operating when I took this picture back in Spring but has since been re-lamped with what appeared to be a shorter 135 watt LPS bulb.

Very nice!

Not working again when I checked today

Much of these got LEDized. One interchange on I-215 still got mostly LPS.

I was also in the area back in August and saw the LED fixtures here and at the Clinton Keith Rd interchange. I did also noticed that Scott Rd still had its LPS fixtures on my way down to meet you and Rick over the weekend. That interchange is scheduled to be re-constructed next year and will likely get new lighting.

CalTrans likely changed them around the beginning of this Summer since they also put the same
type of LED fixtures on Chino Hills Parkway (Part of CA-142 from Carbon Canyon Rd to the 71 freeway) back in June

LPS is such a Rare sight for me. hardly ever see it. where do they use these in large amounts or are LPS endangered because of LED as well?

Form109

This area of Riverside County as well as much of San Diego County to the south are located within the "light pollution controlled" zone that once spanned a 45 mile radius from Palomar Observatory. Low pressure sodium lighting was mandated for this area in the late 80's to early 90's in order to avoid interfering with observatory operations as the monochromatic yellow light was less glaring and could be easily filtered out.