Ideas on raising and lower a light rack

[steve fedyk]

I'm looking for ideas, products or video on how to build a light rack that can move up and down, with or without power.
I got a 300 merainland deep dimension and my plan is to run a two units of ATI 60" four bulb with LEDs running fiwn the middle. I'm thinking ecotech or kesdils for lights.
The frame I'm thinking of making it out of aluminium for the lights.
Thanks for any input or ideas.