The lighting device is hooked up to conventional appliances, and when the switch is activated (i.e. someone rings the doorbell), the light starts flashing.
(The lighting device; is hooked up; to conventional appliances) (the switch; is activated; ) (i.e. someone; rings; the doorbell; T:when the switch is activated) (the light; starts; ) (the light; flashing; )
The lighting device the switch i.e. someone the light the light
is hooked up is activated rings starts flashing
to conventional appliances
the doorbell T:when the switch is activated