Sounds like they took the lumen rating of an old XO3 and put it on the X5. The newest X5 is more like 40 lumens, not 30. I'm pretty sure it has been updated recently as my new one is brighter. The review at flashlightreviews.com is of the 2006 version with Nichia CS l.e.d.s. I think my new one uses Nichia GS l.e.d.s.