Hi,
at that rate, the best way is to simply have two states, one for off, one for on, and you use the action "send event" with a delay of 1 that transit to the other state and done.
simply set the light intensity ( there is an action for this) or simply activate deactivate the gameObject itself, that will work too.
Experiment with this and come back to me if you have trouble.
bye,
Jean