At first I did it go before sleep to the lamp held. Of course, then he lit extremely bright and also loses some of its brightness at night, but that's not bad. Our son is asleep in the dark and I see the pacifier in the morning in bed, because he still lit (even if I have not kept a few extra days on the lamp) or I see the direction in which he lies in bed, as he in him has lights and mouth.
Since then I had to get no more night to give it back the pacifier.