Those streetlights, especially cobraheads are heavy, maybe 45-55 pounds each, and not including the dead weight of the pole and wiring. The hex bar deadlift bar has a cracked weld from three years of lifting and dropping it (I did 135, not bad for a 5'2 stub, eh?
I know. When I had my 70w PSMH ballast in my m250r2, it was very lightweight and I could easily carry it anywhere. Now with a 250w PSMH ballast, it has to at least weight 20 pounds.