I have an infrascan type sensor outside that i am using as a sunset switch for my front lighting. When I have the light level dial on the unit turned near the dark setting the lights will strobe on then off repeatably when the sun gets low (dusk) then the lights stay on when it gets a bit darker. The only way I have overcome this is by backing the dial off but the lights come on earlier than I would like, ie: its still too light to need the lights on. If i turn the dial to the darkest setting the lights will strobe from dusk till darkness (bout an hour or two). It looked quite impressive but didn't take long to get annoying!! Has anyone come across this before? If so..what have I set wrong? All I have is two groups turning on with the sunset function. Nothing is in the movement (day or night) or pulse settings. Thanks.