Very good product but difficult plant

I was looking for LED bulbs GU 5,3 socket and these products are rather effective, especially since the supply is low on the base format. ; The LED brightness is interesting, though less warm than the filaments; one side a little cold but bearable. So I variegated LED and incandescent.
However, the disappointment comes from the volume of the rear part. Having to install the suspended ceiling, their body is a little bigger and deeper than the bulbs they replace and the type of spot, it was not always possible to install the (spot with strapping to hold them bulbs).