On Oct 6, 7:22*pm, "Malcom \"Mal\" Reynolds" atlas-
wrote:
My friend has a 100 watt mercury vapor security light on her garage that for the
most part won't turn off. she's replaced the bulb, it needed it anyway, but the
guy doing her handyman stuff says the sensor has to face north. the wall the
light is mounted on faces east, north faces a 12 to 18 inch roof overhang.. seems
like it would make more sense to face east or even south east, but she isn't
sure if the sensor is able to be rotated and since she has a new one to put in
with what looks like a weird electrical outlet three prong plug, I doubt that it
can be rotated. Any recommended fixes?

Did it ever work? If so, then it would sound like it's
the photoelectric sensor that's kaput. I don't buy the
idea that it has to face north. If anything that would make
the light go off easier, because more light would hit it.