What's this, you ask?
We stumbled across this improvised outdoor screen the other night and snapped a pic with a phone camera. Not the best resolution, but enough to get the idea, and maybe a sense of how pretty it was.
This was a scary dark outdoor stairwell until someone figured out that you could light it (and create a screen for short-term storage underneath the stairwell in the process) by hanging a shower curtain over a string of outdoor icicle lights. The icicle lights gave off a softer, more muted glow from beneath the curtain.
We can imagine this used on an apartment balcony that's shared betwen two units, to make it into two distinct spaces. Crate and Barrel sells clear vinyl shower curtains and you can get a string of electric icicles at Christmaslights.com.