Defiant exterior motion lights- Curious if anyone has experience with these

When I had my exterior of home remodeled, I installed 3 new defiants 4 years ago. In June, the one on my back corner started flashing like a strobe light, but not in any particular pattern. I replaced it myself, so alls good. Now the one on my back porch is starting to do the same thing intermittently. Haven't done anything with that one yet. Now, the one over my driveway is detecting motion, but the light is very dimmed and won't go off. Won't turn off even if I flip the wall switch off. Are these really trash now? It's crazy to me that all 3 of them go out in the same 6 month time frame.