When we look at the power consumption, the Q2790PQU clearly consumes the most power, but we cannot really criticize its power consumption of not even 19W at 150 cd/m². Yes, there are models that are even more efficient, but it is still a solid result. The 24-inch model is one of the most efficient monitors in its class and the 27-inch full hd model is rather efficient as well. In standby the three monitors consume more power than most competitors, but it is still within the norm of 0.5W. We would expect a result of zero when the monitors are turned off, but none of the models in this comparison achieve this result. This is why we cannot complain about the result of 0.2W for these AOC-models.