Uses an Applescript to toggle screen brightness from max brightness to off (ie, zero brightness).
Best used with Alfred 2. To do so, don't forget to wrap the script with:
on alfred_script(q)
-- [code here...]
end alfred_script
!!! PLEASE NOTE !!!
This script is dependent on the brightness command line utility.
Get that here: https://github.com/nriley/brightness
Also note that the /usr/local/bin/ path to the screenbrightness command might need changing depending to the command's location.