ok if you want it to be turned on by a button you do this
1.plant three bricks(doesnt matter which kind u pick)
2.say theres a 2x2 brick for the light you hit it w/ wrench then name it something,i'll call it lite
3.now the other brick can be 1x1 that'll be the on button
4.hit the 1x1 brick with the wrench and click events-on activate-<named brick>-lite-set light (pick a light)
5.the 1x2 will be the off button-on activate-<named brick>-lite-set light-none