EASY ROLLERS PAIRS.
EASY ROLLERS is a system of pulleys to raise and lower the lamps in order to adapt the height of the reflector with the growth of the plants.
Modify your position without problems.
Hold up to a weight of 5 kg.
It greatly facilitates this task since you will not have to make and untie knots. nor use chains...
It is fast and safe and everything remains ordered and just at the height that you decide.