Your sunscreen bottle may look a little different soon. The FDA is establishing new testing and rules for sunscreen labels to make sure you understand just what protection you're paying for.

Sunscreen shoppers like Lauren Justus admit they place a lot of stock in the SPF number, which indicates a lotion's sun protection factor.

"I usually go for the number," said Justus, "the highest number that I see on the shelf."

And she isn't alone.  Customers like Angie Rodriguez admit the process can be confusing.

"It's hard because there's so many to choose," she said.

This summer, you'll see the words "broad spectrum" added to sunscreen bottles. For years, people have purchased sun block based on its SPF. However, broad spectrum provides coverage against both UVA and UVB rays which can cause skin damage.

And experts say you need more sunscreen than you might think: about a golf ball-sized amount.  They suggest filling about one shot glass to make sure you have enough.

If the sunscreen isn't broad spectrum and has an SPF between two and 14, it will carry a "Skin cancer/ skin aging alert" on the bottle.

The changes were initially slated to start June 18th, but just recently the deadline was pushed back to December to give manufactures more time to comply. While enforcement won't officially begin until winter, expect to see changes now. Brand name companies like Banana Boat and Coppertone have already made the switch.

WXYZ