OK, so the flagpole is up, and lighting installed. 150watt Halogen,
with a 25' underground run to the building, using 12 gauge wire.

I installed a photo sensor on the circuit, at the building.

1st photocell: Light does not shut off.

Quadruple checked all my wiring....red from photoswitch to load, black
from photoswitch to hot, white from photoswitch and load to neutral.

Took photocell back to the store.

2nd photocell: Light does not come on, no matter how many rolls of tape
I wrap around the eye, or what time of night it is.

Quadruple checked all my wiring....red from photoswitch to load, black
from photoswitch to hot, white from photoswitch and load to neutral.

Took photocell back to the store.

3rd photocell: Light does not come on, no matter how many rolls of tape
I wrap around the eye, or what time of night it is.

Quadruple checked all my wiring....red from photoswitch to load, black
from photoswitch to hot, white from photoswitch and load to neutral.

At this point I'm thinking the only common thing in all this is ME,
surely the chances of buying 3 bad photocells are too astronomical for
even Mr Spock to calculate.

Hmmmmm, says I, and grasping at straws I decided to mount the
photoswitch at the lamp, instead of on the building.

It's working fine now.

I can't believe there is a distance limitation on a photoswitch with
respect to the load it's connected to.

Anyone else have any similar experience?