In Addition To Having The Highest Quality Parts, You Need To Have An Integratedsystem To Create A Cohesive Lighting Portrait. Unique Hubs Create The Only System That Produces Even Lighting Output At Every Fixture And Allows For Relocationof Fixtures At Any Time. The Hub System Ensures Proper Voltage Distribution Andcan Be Used With One Or More Fixtures, Includes Box, 3 Lug Nuts, 1 Inline Fuse Holder, 1 10amp And 1 20amp Auto Spade Fuse