Hard to see. Where is this located near? Maybe me or someone else around the area can take a picture of it.
Loma Linda, CA did something similar, will have to get pics sometime. Some of the lights they hacked are GE M-400s (new gen, no power door ones), GE M-250R2s, and Hubbell RMGs. It's only a small stretch of them on the Mountain View Avenue overpass that goes over the Union Pacific (former Southern Pacific) Sunset subdivision.
Corner of Chicago Ave and Martin Luther King Blvd.