IPC co-classification in conjunction with cross impact analysis has been used to identify technology convergence and its strength over specific period of time. In this study, we tried to monitor the convergence of lighting control strategies which yields energy efficiency from 2009 to 2013. Also, we tried to anticipate the trend of impacts for near future. We take new approach to utilize detailed information including rate of change of co-classified patents, number of patents in each class, and convergence strength between two classes over time and build possible scenarios to anticipate the convergence trend. In our new approach, convergence strength rate of change is considered along side with two other parameters to understand the reason of rise or decline in convergence strength and possibility of its change in the future. With recent trends considering lighting as a system rather than group of components, our approach would help to anticipate the convergence trends of the controlling strategies including time control, presence control, illuminance control and so forth as a controlling system.