What's the temp. like in there (hotter than the rest of your house, or outside?) and how's the air circulation? Can you keep up the humidity with wide trays of stones and water, though never letting the water above the stones or roots could rot if they wick it in? That's a very key element (more effective than spritzing twice daily). How 'filtered' is the light after 1:30? And how does that work in summer vs winter (when it's not as crucial)? I'd say tropicals and ficus would do well, except for the light issue depending on how good or bad it is. Ivy and ferns need coolth and somewhat lower light (and ivy is a notorious spreader of spider mites inside where air circ. can be a problem).