Set of 10 C37 LED PEGASO, 7W, E14, LED lamp, ø37x100, 6000K, White light, 560 Lm, replaces 42W, 200° beam [Energy efficiency class A+] [Energy Class A+]

2 or 3 have packed in working after just a few months .LEDs are indeed most efficient, but the 240 vac to low voltage DC part in the base gives off lots of heat.So how efficient overall is most debatable.