guys don't post that the FDA might be reading this. I didn't plan on posting mine when i do a review. I took an awesome beam shot that got the color right at dusk yesterday. Had to set my t3i to 3300k. It's so amazing to see in person. Even if yellow diodes do come out they won't be spot on like a DPPS can be. It's neat to shine at orange medicine bottles as it goes right through it and lights it up all yellow. Everyone in my family seems to like it more than my 473nm. I might have to get a LPS sodium lamp. It's a nice balance between the green light of a 532 and the intense light of a red 638.