Morton Arboretum's Illumination: By the numbers

Here's a look at what it takes to stage Morton Arboretum's Illumination:

2: Companies, Lightswitch and Arlington Heights-based Intelligent Lighting Creations, that designed and installed "Illumination," respectively.

2: Years that the arboretum and Lightswitch designers spent creating the display before its public opening in 2013.

20: Miles of cable that link the energy-efficient lighting. "Over the last four years we've seen an explosion in the range of LED technology that's available to us both in terms of saturation of color and brightness," Lightswitch founder John Featherstone says.

2,844: Hours logged by volunteers to manage last year's event.

24: Number of chandeliers hanging from trees in "Crystal Promenade."

32: Orbs along with thousands of "grain of wheat" bulbs that cover "Ornament Hill."

4: Pieces from "The Nutcracker" in a recording play at "Symphony Woods."