Model originally uploaded to Thingiverse at https://www.thingiverse.com/thing:3653019.

NOTE: DO NOT use incandescent bulbs with these filter. They will melt and deform.

I also did not screw down the top piece just in case I need access to the bulb. I instead used metal split dowels glued into the screw holes of the top piece so that they protrude about 1/4 inch. The dowels then fit loosely into the lamp when the top is put in place. 4 dowels are adequate.

After printing, let the bed cool before removing. If the bed is still hot, the filter will bend.

Metal dowels... https://www.amazon.com/gp/product/B01MEFBMG0/ref=ppx_yo_dt_b_asin_title_o03_s01?ie=UTF8&psc=1

Short video of flicker lamp... http://my-3dprints.com/images/videos/Lamp.mp4