Save your self the effort on the pulley rope thing for the halides. Simply put 1-2" blocks stacked and screwed into each other.
you dont want to needlessly stress your corals by moving them all the time until you get it right. I would start the halides 10" off the water and then simply add blocks if you want them lowered down the road.
I also like to put my
vho actinics up with velcrow. Then i can move them out of my way when i need to stick my hands in the tank, without even turning them off. That first flourescent light is always in the way.
FWIW..you will find that the majority of experienced reefers keep their halides 5-10" off the