Revit lighting

How can I find a simple LED strip to go inside an arch in a wall? Do I need to create this myself or can I download it?

Create a sweep by picking the path of the arc. You can set the material to ‘Glass, White, High Luminance’ to look like a light on. Load in just a light source without a fixture and place it where it will distribute light so when you render it gives off the effect of light being distributed into the drawing.