These have actually survived very well for the time involved.
For a sign using LEDs like these, I'd tend to recommend making it easily serviceable to allow routine swapping out of the LEDs to maintain good intensity over time.
Big Clive
2021-06-21 19:25:15 +0000 UTCBig Clive
2021-06-21 16:51:53 +0000 UTCAndrew Donaldson
2021-06-21 15:47:06 +0000 UTCJim
2021-06-21 14:18:46 +0000 UTCMike Hughes
2021-06-21 10:00:55 +0000 UTCRaven Luni
2021-06-20 12:02:20 +0000 UTCJohn Russell
2021-06-19 19:27:37 +0000 UTCKate Cole
2021-06-18 18:15:56 +0000 UTCMichael Thompson
2021-06-18 17:56:33 +0000 UTCGadgetman
2021-06-18 17:27:34 +0000 UTC