I have a 30 x 40 x 14 shop that needs the 8 foot t12 fluorescent lights converted to the drop in led lights.it has two rows of 4 light fixtures running the length of the building equal distance from wall.lights the shop up with no problem.ive read enough about lumens,4000k,5000k,wattage til I’m completely confused.i know I want 4 bulbs in each fixture but need recommendations on what spec lights would work.its a car shop and I would rather have too much light than not enough.only want to do this one time so any suggestions would be appreciated.