en_tn_condensed/1ch/28/13.md

regulations

These were specific rules about how the priests and Levites should work in the temple.

divisions

"groups." This refers to the groups in which the priests and other temple workers were organized to fulfill their duties.

according to the use of each lampstand in the service

"determined by what each lampstand would be used for in the service in the temple." There would be silver lampstands of different weights for different purposes.