I don't have panels but I've got 6 of the 6' long LED battens by LAP from Screwfix in my workshop. I've been using them for 4 years now without any problems. They have a 3 year manufacturer's warranty, so you should have some confidence in them. https://www.screwfix.com/p/lap-twin-...equestid=70189

There is a myth in the UK that products go out of warranty after 12 months. Not much point claiming 30,000h life (3.5 years) if you only give a 12 month warranty. However, if you buy from ebay or Aliexpress, you may struggle to get redress anyway.