hi. i have a bathroom with two doors, and two light switches but want to change to a timer type switch so the kids will stop leaving the lights on all night! can i buy a switch which is compatible with a two-way system? i only need one of the switches to have the timer. also is there one where i can override the timer for when taking a shower etc? and if the kids do remember to turn off the light can you make the timed switch turn off before the time's up? thx