Lit Terrariums
Planted terrariums with their own light in the lid, so they don't need a window.
The light sits in a threaded cap at the top and throws down through the planting the way canopy light falls through rainforest. It's a USB LED — plug it into a laptop, a power bank, or the phone charger already on your desk. Nothing proprietary, and replaceable for a few dollars if it ever fails.
A desk, a shelf, the dark corner of an office — anywhere a plant would normally sulk.