There are indeed photoreceptors on plant to sense light. Flowering plants use the amount of light to decide when to blossom. There are three categories of flowering plants: long-day plant, short-day plant, and day-neutral plant.
Long-day plants need the daylight to exceed a threshold to flower; short-day plants need the darkness to exceed a threshold; the flowering of day-neutral plants is not really affected by light.
Biologists have carried out interrupted night experiment to study the flowering behavior. In such experiment, the plants are exposed to enough light for short-day plants to flower but not the long-day plant. However, if the dark period is interrupted by a flash of light, the long-day plants can then flower while the short-day plants cannot. A strobe of light during the dark therefore does induce changes to a plant.
Now back to the plant to plant communication, currently there are two known methods of plant communication: volatile organic compounds and electric signal. We do not know if plant communicates through light reflection.
However, science is all about exploring the unknown. Perhaps you can design an experiment to see if it is the case. There are the questions you might want to consider: How can we test this hypothesis? Suppose plants do communicate through light reflection, what prediction can we make? What kind of metric can we use to measure the communication?