Repair is usually easier than replace, so I would start with looking at what is wrong with the exisiting! That may require taking them out and tracing out the wiring to find how they were built. For the case where half are out and half working, I would have to look at that part of the design as they can be built different ways, dependins on how much they wanted to put into making them last. There are lots of ways and some save initial cost but with the downside of setting up a situation where one LED failing can then set off a chain of all that half failing , bang, bang, bang!
My first thought would be to find how they worked before failing!
You may want to do some study on how to wire LED lights for things like aquariums as it is a pretty common thing when folks want specific lighting for planted tanks to grow best.
I find fixing is easier than designing from scratch!
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Richard
Why no RV year, make and floorplan on MY signature as we suggest for others?
I currently DO NOT have one!
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