The bulbs are supposed to be certified, if not, you take the chance of them being confiscated coming into the country. I used to go to AMS on a routine basis, there used to be only 1 dealer that carried the certified bulbs, if I remember when looking at the bloemenmarkt (floating market), it was the next to the last vendor on the left. Additionally the boxes and packages they came in would have a hologram tag on the certificated ones.
