I have purchased some side lights 501 from Ebay which do not seem to last very long. Any reccomendation on LED's or is it best to stick to filaments ?
Regards, Jon

classiccarleds sell quality stuff. And Philips/Osram etc. But they won't be anything like as cheap, for a reason.
https://www.classiccarleds.co.uk/search?q=501

I have their super bright stop/tail lghts in my spitfire. And yes, they are BRIGHT. I need all the help I can get as the car seems invisible to a lot of road users.