Basic instructions are here: http://kuffner-sternwarte.at/hms/wiki/index.php5?title=Lightmeter-Driver#Linux
# apt-get install make gcc wget libhid-dev # wget http://kuffner-sternwarte.at/hms/wiki/uploads/LightmeterLinuxMark2.3.zip # unzip LightmeterLinuxMark2.3.zip # make