"ensure you really only have that one night bulb on and the rest is out -"
Flicky switch on wall does that.
" you can make the house look populated whilst away,"
£2 mechanical switch does that for both lighting and the radio. In fact even better, most TV's these days have on / off timers. Looking at the house a night and seeing the flicker of a TV screen is going to be far more convincing than lights going on and off randomly in a silent house with no movement.