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This is a large ceiling lamp made out of a woven plastic bag, some bits of plywood or board, and thin rods if the material is too flexible for its size. This is a 20 kilo (40 lbs) rice bag that doesn't need support rods as the material keeps its shape by itself. The one I show a construction of is much larger and of softer material.
This is the kind of bag that is made of woven strips of plastic (woven pp or polypropylene bag). It has an interesting texture. It is your choice to use a plain or a decorated bag.
Step 1The ceiling plate
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I cut this from MDF. The fancy shape is not needed. You could even use a rectangular piece. The material is not critical. Note that I use fluorescent lights as the heat from a normal bulb could be dangerous (and I hate wasting energy). The small metal plates are anchors for the magnets that keep the bag attached. I used the cheapest kitchen cabinet door magnets the shop had.