Corinne, they publish 3-5 years on the LED life. When I talked to customer service, they said they were underselling the life, and that they should last 8 years or more. Warranty remains at one year, however. I think all of that matches with my own personal experience with LEDs. Only time will tell. They told me that the electronics are the same in both hoods, so there is no more risk of the LED hood itself dying, than there is of the CFL model dying.
I should also note, that I only had them sitting side by side for the picture. Now that they are planted, they are apart, but in the same environment. They do not get any natural lighting where they are sitting, and don't get any light from each other, or significantly from any other source.