Russell Gold reports:

It's been a hot June in Austin, Texas. Fourteen days above 100 degrees Fahrenheit - so far. Ten days have set new heat records. Bad for lawns. Good for Office Depot.

The national retailer of pens, paper, computer mice and other office stuff is opening its newest - and most energy-efficient - store here this week.

Here comes the sun (Office Depot) Inside, the store looked like any other brightly-lit big box retailer. By itself, this is an impressive feat, since much of the ambient light comes from skylights.

But not just any run-of-the-mill skylights. Office Depot installed 50 skylights from Utah-based Ciralight Inc. Office Depot's vice president of construction Edward Costa clambered up to the roof to show off what look like giant plastic pimples. Each one has a reflective mirror that tracks the sun, directing sunlight through a prismatic lens that diffuses it into the store.