Auto flower lighting 18/6 or 20/4

[Nicky]

As a experinced auto grower and after seeing an auto grower poll on another site 20/4

Like @MeEasy said it has more to do with light.

The majority of home growers struggle to reach max light levels so 20/4 is a great scedule.

But really you should learn DLI
You can do that here

Start using DLI

Daily Light Interval (DLI) is a quick and efficient way to calculate how much light our plants are receiving within a 24hr period, allowing for easy light adjustments. DLI will help you and the community to better understand your lighting in a more universal term, leading to clearer communication of what the true light value is. Almost all smartphones have the ability to use an app (we will get to this don’t jump the gun) in order to calculate DLI, and if that is not an option a cheap LUX meter…

Be sure to give the thread a like if you learned something