Pacifier's are a blessing ! This one seemed same as other orthodontic ones, sometimes it glows sometimes it doesn't. But the price is the same. I tried exposing it to light a few minutes before night time but that did not help. However, I am mostly happy with Avent products, the fact that even if the pacifier is upside down its alright is great. My son now likes these new ones. I guess they are just the right size for the growing palate. He is 14 months (teething right now) old. I wish he could write a review! Delivery was prompt & no extra charge that was the best thing that encourages to use well.ca more.