Hello this is Tangelo from the Home Depot Community!
Rotate dial to desired settings:
Dusk-Dawn Lights turn ON automatically at dusk and OFF at dawn
2,4,6,8 hours -- lights turn ON automatically at dusk and OFF either 2, 4, 6, 8 hours later
Cycle repeats every 24 hours
Make sure the light sensor is not facing the lights that are plugged into ithttp://waterheatertimer.org/pdf/Woo...http://waterheatertimer.org/images/...
I hope this helps, if you have any more questions you can find me on our website at community.homedepot.com