Hello,
I also have strong doubts about the expected lifetime. LED lamps produce heat that has to be removed by conduction/convection only (so you need temperature difference). Maybe they managed to use a test setup that is far from realistic operating conditions.
When the lamps are in an armature, temperature rise will be significant in many cases. As life expectancy of electrolytic capacitors halves each 8..10 K increase, I don't believe the 7 to 10 Years, because I don't believe they use extra long life 105 or 130 degrees C. capacitors in it.
Experience over the years will tell us….