Regards your 3-year warranty comment, Brilliance now offers 5-year warranty on all of the low-voltage series. That includes the new 2w bi-pin I gave you to try.
5 years should be enough time to catch the bad units, those that are compromised during shipping/installation, or have weak parts or sub-assemblies.
That's what a warranty should cover, not the entire life of the product. Very few products that we all buy and/or sell offer full coverage. And companies that do so are rolling the dice on their financial future.