Report "With wall switch turned on, motion detector keeps coming on and off every 2-3 seconds. i have unit set for 5 min. can yoy please send me a coupon for a discount on a replacement. i have 4 of your units on my property and this one is driving me crazy. i spoke to one of your customer service reps and he told me about a paper test to put a piece of electricial tape over black window but there is no black window on this unit. i do not have model # but i remember the cost was around $20 at home depot .please help! my name is bill sargent adress is 620 south pine creek rd,fairfield ct 06824 thank you"