I have two GU5.3 bulbs in my bathroom – one of them went off a month or so ago so I bought the following 3 pack: https://www.wilko.com/en-uk/wilko-3-pack-gu53-led-345-lumens-spotlight-bulb/p/0437672
I've gone through 2 of the new bulbs in the space of weeks. I have never seen the bulbs fade out while being on, it's only when we turn the light switch on that they don't come back on (like this morning, I was first in the bathroom and the bulb was off again). No fuses blown or any indication of tripping.
How should I approach this?
Best Answer
Unlike incandescent (in some cases) and fluorescent (in many cases), you will hardly ever see "fading" with LEDs before failure. That's because the failure is generally in the driver circuit and not the LEDs themselves. The enemy of these circuits, like most electronics, is heat. In fact, some large LED lights even have fans to remove the heat. While incandescent bulbs generate far more heat, they are not as sensitive to heat - in fact the only part that "does" anything is the filament that heats up in order to produce light - if it doesn't heat up enough, no light! As a result, an enclosed fixture (which includes a recessed can or similar fixture that is only open in one direction) needs to be designed to dissipate enough heat from the base of the light, where the driver circuits reside, to prevent shortening the life of the light.
Combine that with a cheap/poorly designed driver circuit and you end up with a recipe for failure.
A few things to look for that will help if the problem is a good-enough fixture but poor design/poor quality lights: