There’s no one-size-fits-all standard for this question.
Umumna, di pabrik anu jangkungna tilu méter, fixtures lampu handap 40W ilaharna dipisah dua nepi ka tilu méter eta. Pikeun spasi ngaleuwihan tilu méter dina jangkungna, 50-70W fixtures diperlukeun, dipasang dina interval opat méter. Sanajan kitu, the specific needs depend on your requirements for lighting efficiency.