The evidence speaks for itself, this is not a cheap bulb. They use EPISTAR (Chimei) LEDs. Going through the test reports I saw the 4.5W GU10 lamp has no electrolytic but the 1.5m tube does. The jury is still out on the normal bulbs, but knowing what the inside of the "ball" looks like I know all the electronics is down in the fitting metal cap and there is very little space for large electrolytics as well as EMC components so it is highly likely their normal bulbs do not have electrolytics either.
Richms, you might have bought a few bulbs from a lower quality assembly batch, it happens (unfortunately). Next time try a different shop or at least a different box of stock. In 6 months since we moved into our new home I've had to replaced almost 1/4 of the Philips Softone bulbs. Some lasted only a few days, like the one that failed during the final inspection. Then there was the one that smoked, literally, my wife thought the wiring was on fire and wanted me to go into the roof to check.