Coming from a sunny country, living in northern Germany for some time was a torture to my during those looong and dark winters! I would have enjoyed having such a gadget!
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the more I move, the deeper I get stuck !
I don't know about the UV contribution of LED's, but I suspect is quite small. What I can see is laboratories being lit more like an artist's studio, and I would really appreciate having done with fluorescent lighting has done to me.
I grew up on a farm, and mostly played outdoors. Being in my office/laboratory is to me gloomy even on a sunny day.
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If it ain't broke, don't fix it. Just build a better one.