Unfortunately, I can't measure it, as it is installed below the wooden deck. But, certainly NOT 79.5 m cable length. Rather the length you see in one of the photos (between 2 and 5 m). You can also add 5 m extension cables, so 79.5 m makes no sense. Besides, the manual says: Max. 100 Watt/35 m. So you will hardly connect a cable length of 79.5 m to a lamp. Must be a typing error: should be 79.5 cm LED length... Super lamps, I have hung 3 of them together.