Hi,
Lighting art is more than just some number of lumens.
Considerations include what is the ‘art’ to be lit, ceiling height, fixture distance from the wall, color rending (CRI) and beam spread of the bulb used, fixture choice (framing projector style, fixed spot, track head, etc.) and others.
If you’d provide diagrams or images of the display area it would help houzzers to offer opinions to answer your inquiry.

When my wife and I and our friends Tom and Freda visited Italy in 2011, I told Tom that if he bought this stingray at Murano in Venice that I'd design and build an appropriate display. It's gloss black thermoformed Corian Nocturne with built-in lighting. We fished a wire through an upstairs closet to install an overhead ceiling light which isn't pictured.

I love Tom and Freda, so I did this for material costs only. Anyone else would pay about 2K plus shipping.