At this point your application still won't work because access to the GPIOs on your pi needs to be set up. Access to the GPIOs on the Raspberry Pi requires root access. It isn't wise to run your web server under root, so a separate server was implemented to provide access to the GPIOs.
Logon to your Raspberry Pi (ssh or at the command line, it doesn't matter) and install 1 python module:
tar zxvf -
sudo python install
With that module installed, the server can be started (must be running for the web application to work)
sudo python /home/www-data/web2py/applications/Home_Lights/modules/
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