soer I'm a lil cornfused..doya want to raise them or lower them? Forget the chains..wot a pain.
They way it works for me is that the spot is empty and I can be under there with a stepper or bucket and reach my
rope ratchet pulleys to lift them up and get plants under there. Which you do by squeezing the little lever on the ratchet. One side at a time and you can free one hand to support the light. This is the hardest step. From that point it's all raising the hoods with plants underneath. If you leave the ratchet cord long, they are very easy to pull and the ratchet stops keep you from having to support anything.
They're cheap and easier than chains.