Highmasts are great for parkign lots. They light large areas with fewer fixtures and fewer poles. I wonder why highmasts are as common as pink lettuce in parking lots....
They don't look good, I would guess that's a factor, plus they have to be mounted higher, and unless you use winched ones then you have to find someone willing to service them, and when you do it will cost a lot.
Well, most highmasts have lowering devices which make servicing not even require a bucket truck. Just a key to unlock the lowering controls box at the bottom of the pole. The person who installed these without a lowering device isn't very bright (no pun intended)
I have seen GENUINE highmasts (That lower too) At a mall parking lot in Louisville, Kentucky. All around that mall there were high-masts in the parking lot.
Here the high masts are serviced by crane. They bring in a refurbished pole and put the fixtures on it and wire it on the ground, then use the crane to remove the entire pole before replacing it with the other one. This then gets repainted and relamped before it goes to the next position.
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I am not sure but I THINK they lower too.