How long do the sliding brackets on the Easy Plant LED light extend?

The Aquarium Co-Op Easy Plant LED is made with expandable brackets, which allows smaller models to be “sized-up” to the next aquarium size. The brackets on each end of the light slide out so that they may fit slightly wider aquariums (for example, going from a 36” wide aquarium to a 48” wide aquarium). The 12-inch light model has the brackets extend 4.5 inches on each end, for a total of 9 inches. For all of the other light models, each sliding bracket extends 7.5 inches on each end, for a total of 15 inches.