I should mention that when it comes to calibration (using a hardware/software setup) how those apps handle Brightness vary. Some don't even mess with Brightness, some will measure it and report back to you, suggesting a "value" for adjusting the monitor, and then others can throw you off because they "read" your ambient work-space lighting, and will either direct you to adjust relative to that ambient light or they may even do it automatically, and in that scenario it may not be a good level for prints!
I personally prefer to handle Brightness on my own, and then I'd let calibration stick to handling colors. It's OK if the calibrator reads and reports Brightness, but I don't want it bothering with the ambient, or especially automatically doing the adjustment whether I like it or not!
All that being said, though, it's been a while since I used a calibration "tool", although setting the Brightness down for me is something I'll do right off the bat...so take that into consideration, I don't get involved in serious calibrator/calibration discussions!