Hello, and welcome to JA!!
What type of switch controls the lights in the resident rooms, and could you elaborate on the occupancy sensors?
Just a general use snap switch for the residence. Occupancy sensors are for areas in the hallways and common areas. These areas are not where the problem is. Hallways and common areas are different branch circuits. I already checked all the normal issues like switches, voltage, connections ect. I am looking for someone who may have experienced failure of LED lighting on a large scale with high failure rate and possible solutions.
Alright. I will opt out of this question so that other experts can see it. But I will continue to give it some thought and if I can come up with another idea, I will let you know.
okay thanks for trying. I think I need an electrical engineer to varify if my previous advice of using MOVs to suppress voltage spikes is the solution.
Hi, I'm Norm and I'd like to help. I've looked up LED failure modes and two things keep coming up: excess temperatures and voltage spikes. Since the failures occur only in the resident's rooms, there is something unique in those rooms' electrical or physical environment. First, I would look at the fixtures themselves and possibly take some local temperature measurements inside the fixtures, comparing the readings with the LED manufacturer's specs. The electrical environment is tougher to evaluate, but one thing I would look for is inexpensive dimmer switches on other lights in the residences. Low-cost dimmers can produce repetitive spike voltages when they operate at less than full intensity. If there is no apparent temperature problem and no dimmers, I would pick a room or two and apply the recommended MOV';s or other surge protection on those circuits to see if it helps. If it does, obviously, the problem is voltage spikes. Please let me know what you think and whether or not you have the dimmer switches or other spike voltage sources present.
Here is a link to a paper on LED failure modes:
Thanks Norm, this is what I needed. I appreciate the help. Tim