Fixture spacing starts with ceiling height
A warehouse with a 12 foot ceiling, a 24 foot ceiling, and a 40 foot ceiling should not be planned the same way. Higher mounting usually needs more output, better beam planning, and more attention to shadows from racks or equipment.
Racking changes the way light reaches the floor
Tall racks can block light even when the fixture itself is bright. Aisle width, rack height, fixture position, and whether fixtures run parallel or across aisles all affect the result.
The old layout may be usable, but it should be checked
One-for-one LED replacement can work well in many existing buildings, but dark corners, glare, blocked aisles, and uneven coverage should be reviewed before repeating the old fixture plan.