Sorry to burst any bubbles, but being totally objective and judging from just the photos given above, the M7 is the least brightest light.
A very simple way to tell is to look at the small "windows" on the garage door.
With the M7 you can clearly see the eight small windows, but with the 12PT, the ones in the middle become less clear because of the higher amount of light.
The SF M6 is even brighter, the middle two windows being almost completely white.
The SF 10X is the brightest of all, totally wiping out at least three windows.