Hampton Bay Motion Sensor Light Manual

Bob,
Recently I installed 4 Hampton Bay Motion Sensor Lights in the exterior of my home. Two of them work like a charm. However, the other two just recently started malfunctioning. The switch inside the garage remains on of course supplying power two both lights. They have both operated properly for the past three months since installation. However, I have noticed for this past week that the lights are still on during the day with bright sun when I arrive home from work. I have made NO changes to the lights as they are exactly the same as when I installed them. I did try resetting them by turning the switch off for a couple of minutes then back on. The lights come back on as normal for about 20 seconds, blink three times to tell me they are functioning properly then turn off because they detect light. I checked them several times and they stay off until dusk. Again they do function properly when I reset them during the day as photocell keeps them off with sunlight. But once dusk they work fine but remain on at dawn and have to be reset now each afternoon. I could understand one sensor going bad but two? I would call hampton bay directly but cannot obtain their number. Any help you could provide would be much appreciated.