Quoted:
I have a Scout M600C with KX2C LED and a LU60A with P60 and FM63 Filter.  The LU60A with P60 is for night missions. Should I replace the P60 Lamp with the P61 inside of a LU60A module for night vision only use?

Quoted:
Not sure really.  What would be the happy medium?  I don't see the light being on for more than 2 hours, and would have batteries readily available.  Now that I think about it, since I will always have night vision readily available, should I sell the KX2C head and just get a P61 Lamp?  I can't decide on if it's worth the extra load carrying an extra head?  When would I use the KX2C vs a LU60A w/ P61?  Should I run an illuminator instead of trying to make the Scout work well for NV?  I'm thinking of putting a helmet mounted illuminator like this http://www.surefire.com/HelmetLight-B

Quoted:
In real world, the P61 is only slightly brighter than the P60, while having significantly less runtime and drawing more current drom the battery, which may be a problem if you're using the tape switch. I'd stick with the P60.