Lightning is key in photography. I started to do extreme electronics macrophotography using a 4X microscope objective: (blog post), but the photographs had low contrast and shadows. So I created this little USB-C powered LED fixture that fits on top of the microscope objective and illuminates the scene. All files (PCB, 3D housing, BOM) are in the repository files on my GitHub. Feel free to build your own.

Render of the PCB
Render of the lamp PCB
Photograph of the lamp press fitted to a microscope objective (top view)
Photograph of the lamp press fitted to a microscope objective (top view)
       
Photograph of the lamp press fitted to a microscope objective (top view)
Photograph of the lamp press fitted to a microscope objective (bottom view)