the LED candle was the first one I bought - and I was surprised at the light output (but had an extra one lumen-strong selected). For a few months in operation, no failure, no flickering. Use it in a 4-burner lamp in the kitchen - have, however, only 2 of these and other (weaker) in there, that's enough for a pleasant brightness in full! The only drawback is the relatively high price ...
