[lowkey]

You know, I co-founded a smart LED lighting company well over a decade ago and we considered this market.

It seems like the potential applications might make this viable now. Cruise ships are a tiny market when compared to all the dead commercial office space in downtown cores that people wish to convert to residential but can’t because of lack of sunlight and similar reasons.

[EnigmaFlare]

That's cool. How did/would the technology have worked?

[lowkey]

There are some other implemenations listed on this page. The trick is to make sure the light rays are parallel as if coming from an infinite distance like the sun. To create the blue sky effect the easiest way is to pass the light through soapy water like in this video posted above https://youtu.be/6bqBsHSwPgw?si=fWO5-pYa6kPYKLZO