It was really a shock to see that 520nm second from left with the other ones. You can really see the blue in it so I must have gotten a real freak with that one. It may be 10nm below what it's supposed to be. I will have to take a look at it compared more to the second from the right as that was a 515nm that has some blue in it. If you look in the first beam pic you can see the second from left has blue in it. The 2 really special ones are second in and second to last although if you look at the first beam pic the one on the left is supposed to be a 510nm. You can see just a tiny tint of blue in the 510nm but not like the other 2. I may go back and use something to hold in the momentary switches on the pens I have that are 520nm and below.