You need to give more details about what upper season profiles are. Assuming it's just adjusting the length of time the light is on each day by adjusting 'sunrise' and 'sunset', An arduino should be able to do it easily.
As to power, even if it's running at full power all the time, I suspect that the power draw will be negligible compared to the lamp. If that's not enough, various sleep modes exist to make Arduinos very frugal on power consumption as long as you don't power them through the on board voltage regulator.