You need to:
1) Edit week: here you will find all the "settings" regarding the conditions of the environment in which you are growing. Here you will find:
2) light schedule: by clicking above, you can simply set it by writing 18 (not 18/6 or 18 6 otherwise it will give an error and show Nan)
3) save
just type in "18"
edit each week necessary.. the hours of use is input per week, so you'd have to fix it for each. The dark hours aren't displayed, just assumed. Although, the rotation of earth is slowing, so it's getting longer each day, eh? :P
Hello @Kodabigmouth !
As the other users already said, all you need to do it to put the amount of time the light is on. In your case, all you need to do is to type the number 18.
Happy grows buddy