If you have an 24" M1 iMac and want to use a light bar to reduce eye strain, you have to choose between having the lights off center or mostly covering the builtin FaceTime camera.  If you also want to ensure privacy by blocking the camera when not in use it causes a whole other issue.  Most light bar's don't overlap enough on the front edge to fully cover the camera when you want privacy, and block about half of it when you don't.

I designed this to fit close enough that it would not wobble when raising or lowering a standing desk, specifically to the dimensions of the 2021 24" iMac display.  This raises the height of the light bar by 6mm, which clears the camera and doesn't create a glare.  

I took a cue from https://www.printables.com/@3D_MD_65434 and made sure the design has openings along the top and back so it doesn't cause issues with the 3 mic openings. I printed in white PLA, and included an inset area to place one of these CloudValley Camera Cover Slide, which it blends in nicely with the bezel around the screen.  You can use cover slide's adhesive backing to hold it in place, or a small drop of superglue.

This is designed to print upside down without supports, I've included the STL and Code for printing with a .6 nozzle at 1.5mm detail setting and the ‘Generic PLA’ setting in Prusaslicer.