The daylight performance of buildings can be controlled by using electrochromic (EC) glazing as the tint of the EC glass can be altered by the application of an electrical voltage. One issue, however, is the selection of the strategy to control the tint level and obtain appropriate daylight and the least energy consumption. A new control strategy is proposed, which consists of comparing the simulated performances of all possible EC states and selecting the most appropriate at all times. The new strategy is compared to two commonly used strategies to show its ability to improve both lighting performance and energy efficiency.