Consider - sunlight duration is a critical trigger in the lifecycle of many, many species, most very tiny. Insects and smaller. They can time dormancy to day length. Not the average, since weather is so fickle: even a flicker of sunlight means daylight because, only the sun can do that so it must be up there.
Bring a species out of dormancy at the wrong time of year, and it'll probably die. Do it over a broad area and it becomes an extinction event.
What micro-biomes can we do without? Who knows. These guys aren't even talking about it, I imagine. Just a gee-whiz thing - We can make it as bright as day, during the night! Wouldn't that be cool?
Not cool.