11 LEDs in series burn around 60V at 20mA.  They have acceptable color.  They get hotter than the blazes of hell & damnation itself, relying on the base & the screw mount for cooling.  Like all LED bulbs, the LEDs can't be extracted.  The mane advantage is they have room to bolt on a heatsink & rework.  The LEDs aren't wired in numerical order.  If LEDs 11 & 6 are smashed, they can be points for wiring in 3 parallel.  That makes 16V at 60mA.  There's no way to reconfigure all 11 for a lower voltage.

It's leading towards random arrays of inexpensive LEDs.  Suspect all apartments of the future will be lit by taping random LED strips to ceilings.   It would be nice if LCD backlights could be used, but they're too blue.