I have to say I am super impressed with Radiant lighting, I installed 2 x LS 534 light fittings buried in the ground. 15 years later, yes you heard right 15 years later one of the 70 watt lamps stopped working. This would be the longest I have even heard of a light working without replacing a lamp. For a light installed below ground level makes it even more impressive.


Let me know what the longest you have had a light working without replacing the lamp.