Bar style LED’s with removable drivers, how close to the roof?

[Rama777]

I’m trying to decide between 3 different lights for my tent. One determining factor is how close a bar style can be mounted to the roof of the tent. What do you guys that have bar lights with removable drivers think?

 

[Natep]

I have both of mine as high against the roof as possible. Probably about 4” from the top you can kind of see in this pic.