Degradation LED

[Swampman]

Hi I am having a problem with thread algae. I have done everything possible to at least get it under control. Now my thinking is the light. It is an LED that is 10 years old. If I do the math 9H/d x 365dx10y equal 32850 hours. Yes I clean the lens when I do water changes cover too. I have a newer LED that is brighter than the old one even when it was new. I haven't had any problem with hair algae until 2 years ago. What do you think?

[Autumnsky]

It is an imbalance some how. Sometimes the age of the tank could be in play. Did you used to dose any ferts? How often do water changes before 2 years ago and now?

Did you change the quantity of fish?

What type of plants do you have?

Also I am dealing with algae issues and recently read about dosing Seachem Flourish Excel which is a CO2 alternative.

Check out if you think it could help you.
https://www.seachem.com/flourish-excel.php

also was watching a good discussion about algae
Aquarium Co-op on YT
How to Get Rid of Aquarium Algae​ | Causes, Different Types, & Algae Eaters

I will PM you the link.

Other lights tend to lose some intensity of spectrums and allows others to be more intense. So maybe possible with LEDs.