The fixtures existing currently are up to 6ft
If you are lucky to get a used old fixture then you also have the options of 8ft
I'd suggest to use modern
Get a louvered troffer strip (as used for office spaces etc but one meant to be installed on a plain ceiling - not a recessed for grid ceilings) of 1x or at most 2x
Outside it is just a white box with metallic louver bottom Can even use it as a shelf.....
When lighting it emits a lot of light straight down, lightwashing the wall and whats below (table ? countertop ?) but the fixture itself does not emit glare at all (other than the brightly lit wall)