I tried using an LED strip, but it lacks the range in light. You can try to make a Bethlehem cross out of wood and attach
smart light bulbs to it, which will shimmer with any colors of your choice. If you want white light bulbs, these light bulbs will also cope with this task. I like that these bulbs can be controlled remotely via an app on your phone. Do you want to attach this cross on the street or indoors? Perhaps my version will look more beautiful. Try light bulbs, not LED strips. Or see how these light bulbs look on YouTube if you're in doubt.