I made this to improve our home theater experience by blocking the direct light from the bulbs.  It made a huge difference!  

Print with or without the blacked out portion.  If you want the blacked out part, then you'll need to do a filament change on the 6th or 7th layer (if printing at 0.20mm layer height). 

Print 

There are two versions: 1) a single wall, 2) double wall for using fuzzy outer skin.  We preferred fuzzy. 

I printed in PETG transparent and black.  White may work in place of transparent. Depending on how much heat your bulbs put out, PLA may also work. Perfect fit printed as-is on my MK4.