SLED light fitting to suit 24 LED board such as https://www.aliexpress.com/item/R1B1-Super-Bright-12V-White-Piranha-24-LED-Panel-Board-Light-Energy-Saving-Lamp/1363619363.html?spm=2114.13010608.0.0.Ri7ZjE

I've used Transparent PETG for the diffuser

I printed these parts with a 0.25mm layer height. The light base has a layer of this height ,blanking off the fixing holes, mid way up to act as support for the small holes above. It worked reasonably well when I printed the parts but some cleaning up of the holes was required.