I have recently installed them, they seem to be very good switches and the LEDs inside seem to be new technology that probably should not burn out as easily as the previous one mentioned. I don't know if they have changed, probably the older ones were not LEDs, their light is very intense, it is a millimeter, it is true and it appears intensely in orange color when it comes to a switch and green color when it comes to a button of a climatic station

I replaced the staircase and doorbell buttons for a building with this specific series. The previous brand never had any problems and the LED lights on the illuminated buttons had a long lifespan (I can't even remember when was the last time an LED burned out). In this specific series, the LED on all the buttons burned out after about 1.5 years (the doorbell buttons burned out even faster). The electrical installation has no issues. I asked 2 electricians and learned that this happens with this specific series. The replacement LED (which is actually something like an LED) costs about 5 EUROS EACH, it is only available by order and only from LEGRAND, who made sure it doesn't fit any other brand and has you... as a subscriber! Therefore, the switch neither serves its purpose at night when it should be visible on the staircase, nor is it worth its money with such an expensive replacement part that costs half the price of the entire product and needs to be paid for every 1.5 years (not to mention the hassle of procurement and replacement). I removed them all and put the old ones back in.