I believe you are making the circuit too complicated. The power from
the motion detector would override the photocell/timeclock and your
light would work off of your motion sensor.
I would recommend just using the motion sensor. Most motion sensors
already include a photocell, so your light wouldn't turn on in the
By using just the motion sensor, you will save money on your
electricity bill, because the light would only be on when it detected
motion and not for the 5 hour period each night. You would save more
money from not having to purchase a timeclock (approx. $50.00) and
another photocell (approx. $15.00). The circuit will also be less
complicated and have less things to go wrong.
Good luck and be safe,