These are LED bulbs to replace the halogen bulbs in the taillights of a Ford F-150. They are much brighter and use less energy than the dim factory halogen bulbs. Pretty simple job to swap out, and they come with the needed resistors to prevent hyperflashing and radio interference that can come from some LED's that do not have resistors wired in. They were ordered from Headlight Revolutions and sold for $192.00. They are brand new in the packages. I am asking $40.00.