Question about aging LED lights

I have noticed over the last few grows that the frost on my plants is less and less. Same clones but different outcomes. I'm starting to think it's my lights. I have a few HLG Scorpion Diablos and a few Chilled Growcraft 600 watt. They are all 5 plus years old.

I called HLG and asked he same question and their reply was that they can last 10 years no problem without diminishing returns. That does not seem to be right IMO. I still get the same par readings but the frost has diminished over 50% at end game. Same food, same clones and same lights.

I'm thinking about replacing 1 out of the 4 lights just to see what happens. Opinions?

Could be the clones just as well, even though the the genetic is same there could be some epigenetic drift: genetics losing their magic.

If it was any other lights id be inclined to say go for it but dem sum expensive and really good lights. If par levels are the same my suspicions would not be the lights.

Why not try playing with other factors instead? Cold finish? Or a little bit of UV? Though if i were adding uv to the scorpion spectrum id try to balance it with a little more red light inorder not to get any yield loss from blue response.

My tents are way too hot all thru the grow. I have no way of cooling them any better than I can do atm.

Do you reuse soil? Some people describe losing punch overtime if not perfectly balanced

BongChoi said:

Do you reuse soil? Some people describe losing punch overtime if not perfectly balanced

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Na, always fresh