The upper left light is on in the PM, off in the AM.

The center left light is off between 12:00 and 4:00, flashing between
4:00 and 8:00, and on between 8:00 and 12:00.

The lower left light is off between 12:00 and 1:00, 4:00 and 5:00, and
8:00 and 9:00; flashing momentarily on from 1:00 to 2:00, 5:00 to 6:00, etc.;
flashing momentarily off from 2:00 to 3:00, etc., and on between 3:00 and
4:00, 7:00 and 8:00, and 11:00 and 12:00.

The upper right light is off between :00 and :15, flashing momentarily on
from :15 to :30, flashing momentarily off from :30 to :45, and on between
:45 and :00.

The center right light is off between :00 and :03 (+:15, +:30, +:45),
flashing momentarily on between :03 and :06, blinking steadily between
:06 and :09, flashing momentarily off between :09 and :12, and on between
:12 and :15.

The lower right light is broken.