Lighting layout for 50’x88’x16’ with scissor trusses

[Anta001]

I am looking at a recommendation for lighting in my pole barn. It is 50’x88’x16’ with scissor trusses so it’s little over 20’ in the center

Trusses are spaced every 8’.

I am wondering if they should all be same wattage or different due to change in height of ceiling.