All of the purple lights I've seen have been of the same design, and they seem to be in towns that are (at least to some degree) cash-strapped. The manufacturer

All of the purple lights I've seen have been of the same design, and they seem to be in towns that are (at least to some degree) cash-strapped. The manufacturer better be replacing these under warranty. There aren't any of them in my town, though I've seen one LED streetlight so far that went out. The main streets have lights with a slight yellow tint, and the side streets are neutral white, which I find much more pleasing than the purplish mercury arcs they replaced.