NY wrote on 21/10/2017 :
LED bulbs are very fussy about the ventilation of the light fitting (the
cylindrical shank of the bulb). The light-emitting part of an LED bulb barely
gets warm but even a 7W one gets almost too hot to touch close to the
fitting.

I swapped some 100w 100mm ES floods for 9w LED's in the kitchen, backed
up with a hidden 6' fluorescent for additional light as needed. Those
9w wide angle flood lamps barely get warm when on and have been in use
for 12 months now. I would get concerned about the life of any LED
getting near to too hot to touch.