This simple doodad slips on to the end of an IKEA JANSJÖ lamp to gently dim and diffuse its piercing light, so that you can look directly at it without burning your eyes to smoking craters. Print with more opaque filament for a greater dimming and diffusing effect. This is sized to fit onto the end of the lamp exactly, without need for any adhesive. However, due to the tolerances involved, try printing the lamp first a bit quick and dirty and check it for fit, and size it up or down by 1% before printing again.