Can't stop thinking about using the rail. Hard to find the right words.
I believe that when the light is moving, even only that short way,
that the light falls in in different angles, so the lower parts of the plant will get more light.

Here's a pic to show u my thinkings:

Attachment 297112

What do you think ?

Maybe i don't use it the first run and then use it the second run to compare ;-)