Some 4th Gen Camrys have dealership installed accessory foglights. (or some years a "sport" package was available from the factory that consisted of fogs, alloys, and a spoiler). If you want to install them now, good luck. You can order them from the dealership.... very Very expensive. They are really rare otherwise. You can keep an eye on ebay- they pop up once or twice a year used.
Those factory/dealership installed fogs are difficult to install. You have to actually cut the bumper in order to get them in. (You can also get a cutting guide kit from the dealer...$$$)
You also can not get them from the dealership painted- so you have to have an aftermarket shop paint them to match your color... which would be even more expensive.
**These are for U.S. cars. Other parts of the world have different fogs... and I don't know much about those. U.S. 4th gen Camry fogs were round and in the lower bumper. Other parts of the world had little square fogs that are the outsides of the bumper.
Other than OEM fogs, it is strictly preference. Not many fogs will fit in the bumper openings of a Gen 4 camry. They will need to be very thin. They do exist though.
PS: Please use the search function before making a post. this topic has been brought up many, many, MANY times. If you search you'll find lots of pics and examples.