What happens if a fixture fails?
You call me and we come out and fix it at no charge for five years. The warranty covers the LEDs, the channel, the controller and the labor, so there is no part of the system you are exposed on.
You are not filing a claim with a manufacturer in another state or waiting on a parts queue. You are calling the person who was on your roof, and service visits inside the warranty are free. There is also an optional lifetime LED upgrade that keeps the light output current for as long as you own the house.