Giant Food Stores fifty percent of the market in Central Pennsylvania which means one of two shoppers in the area might be seeing changes.
Susan Anthos has been shopping for many years at the same grocery store in Cumberland County.
One day last winter, Anthos says she thought she noticed a change at her Giant Food Store in New Cumberland.
"With everything they are doing here, it seems like foods are fresher," says customer Susan Anthos, "I don't know if its my imagination but it does seem fresher."
It's not her imagination. Giant in New Cumberland is participating in a pilot program to make the company's store more energy efficient. Some of the examples include making changes to the produce, meat and dairy aisles.
"We have got lots of doors now that covers those areas," says Giant Public Relations Manager Christopher Brand, "so instead of having that coolant or that refrigeration spill out on to the sales floor it's now kept tight behind doors."
LED light bulbs have also been installed everywhere from shelves to the parking lot and by crunching the numbers the company is seeing the changes.
"Over the last six months there has been energy savings," says Brand, "anywhere from 35 to 50 percent "
With the energy experiment, Giant Food Stores hope to model other stores after the grocery store in New Cumberland making them more efficient across Central Pennsylvania.