The lights use one of the underhood liners push in tabs to hold it in place along with some double sided tape. This is not your standard L.E.D. that we are using on these. This custom made LED panel is made exclusively for us by one of the leading LED manufactures. The unique LED is a 3x3 matrix for a total of 9 LED's and most importantly it also includes a constant current chipset for the fixture itself. This constant current chipset helps to prolong the life of the L.E.D's by regulating and smoothing out the power supplied to the LED's from the constantly varying line voltage. This keeps the lights at the same brightness all the time and makes them last nearly 5 times longer. The chipset also has a built in EMI suppresion circuit to help eliminate any noise from going back into the rest of the cars delicate electronics. The housing is made from powder coated CNC laser cut steel for durability and also has side shrouds on it to keep you from seeing the LED's directly, which not only looks better, but keeps from blinding you while looking at the engine. The kit comes with 1 shroud with the LED attached and 6' of color coded wire attached to the fixture, we hooks directly into the parking lights, so that when the parking lights are on the underhood light is on. A switch could be added if wanted, but the LED's will outlast the car. You also might want to consider ordering the trunk light at the same time to illuminate the trunk at night, making loading and unloading much easier. Installation of the kit involves no special tools and can be done by most owners in 30-45 minutes.