For those of you who follow me on IG, you might remember this or this when I had made a series of paper geo shapes for the String shelf in our bedroom including a paper diamond. I've had this idea churning in my head and decided to give it a try this past weekend.
I used some vellum paper & this template + instructions to make the diamond shape. Then I sprayed the diamond with silver spray paint, mostly on one side to leave the other still sort of opaque. Finally I cut a cross shaped slit at the top and put them over the lights. When the lights are on the diamonds glow since the paper is slightly sheer.
Let me know if you give this a try!