Do you have a T5 reflector with 2-4 tubes or just a single bulb? If you have a reflector they are somewhat heavy. Build a hanging light frame like below.
If you are not going to build a small room for your seedlings/clones, just build a hanging frame. All you need is a single 8' 2x4, drywall screws, drill and saw.
Forgive this quick crude drawing, I couldn't find a picture of one.
Hope you can understand the drawing(top view) The two 2x4s on each side are flat on floor, the two 2x4 pieces coming up from the middle of those two flat 2x4 pieces connect to the one top long piece which would be a little longer than the length of your T5 light reflector. Just use drywall screws to assemble. The two circles are the holes your clothesline rope go through, they each come out to their own side and come down and you can screw drywalls screws(two on each side) to secure clothesline rope like this
This is a top pic of a full small room, but on each side of that frame drawing you just need to screw in two drywall screws like you see above, and just wrap the clothesline in a figure 8 to secure light when you reach desired height.
You can either tie other ends of clothesline directly to your reflector to save space or just tie to light hangers.
Here is that T5 reflector below that clothesline pic.