What do you have now?
For me I made the huge mistake of doing 8' fluorescents and that was one if the biggest mistakes in my life. 8' pickup no problem, now problem, and they never put out the light I needed.
Someone was getting rid of about 25 of those "office" type 4' fixtures, I took them all. Converted some, bought conversion not needed bulbs for others, had no real idea on how they would last, so hedge my bets. Both are going good.
I would think with the world moving to LED you might get some fixtures being gotten rid of for cheap or free. The "tombstones" are easy to replace and getting the rest of the garbage out of there is easy to run just LED. I think the bulbs that you keep all the fluorescent stuff in eat more electricity, but I did not know how they would do in a non climate controlled shop, so far so good.