For now I'm adding some renders as photos, I will ad photos when i pront it myself, but I have been making some decorative lamps lately that house LED tealight (approx 3.9cm in diameter). This one is about 16,5 cm tall. I would suggest infill not more than 5% infill and not the most opaque filament (i use shite silk PLA) and the stronger the led, the better ofcourse. I'm adding a photo of another lamp I made so you can see how it works. It has two versions - one with hear shaped holes, and one solid.