What you want it somewhat difficult to implement. As light switches are currently implemented, they physically close and open the circuit. You will need the lig

What you want it somewhat difficult to implement. As light switches are currently implemented, they physically close and open the circuit. You will need the light switch to be just another signal, along with the web-switch and timer. Have all of these signals route through a uprocessor, implemented whatever logic you need there, and then use the uprocessor to control the actual light. You will need a magnetic relay, and you will need to remote the light switch from your main home circuit.