What is "Light Source Communication?"

LSC is an communication with an unkown intelligent entity by using an energy source to create light.
At PSP we use a simple flashlight with a twist cap that turns the flashlight on.
1.Twist the cap to where the light just turns off and place on a immovable object  (floor, table, chair, etc...) 
2. Ask questions that can be answered with yes or no. Ask the entity to turn on the light for a yes answer, leave the light off for a no answer
3. Use two flashlights and have the entity switch from light to light for verification
4. Activate a voice recorder
5. Activate a EMF detector
6. Activate a seismic movement indicator
7. Film the whole encounter