michael@Rocket:~$ ./brightness 50
michael@Rocket:~$ ./brightness 100
michael@Rocket:~$ cat ./brightness
#!/bin/bash

cd /mnt/c/Users/Michael
./brightness.ps1 $1
michael@Rocket:~$ cat Windows/brightness.ps1
#!/mnt/c/Windows/System32/WindowsPowerShell/v1.0/powershell.exe
$level = $args[0]
$monitor = Get-WmiObject -ns root/wmi -class wmiMonitorBrightNessMethods
$monitor.WmiSetBrightness(5, $level)
michael@Rocket:~$