That’s a good question. Current the ‘duration’ can only be a fixed amount of time or the time between sunrise to sunset or sunset to sunrise, it doesn’t give you the option of from sunrise to a fixed time etc. On the firmware side, this is relatively easy to implement, but it does require some considerable changes to the UI/app as well since it needs to provide the users various options to configure the water time. Just out of curiosity: if you are using it to control lighting, shouldn’t it suffice to set it to turn off at sunset time? What would be the situation to have it turned off at 10pm?