This Complete 6 x 200L LED Spot Light Set (18 Watts total, expandable to 45 Watts). Set includes 6 x pre-wired spot lights, a 45W transformer, 3 x 10 ft. extension cables and a Y branch connector. Everything you need is included in the box. There are no tools needed for installation. You can add additional lighting fixtures (sold separately) to this system as long as the total wattage of the system does not exceed 45 watts. Use extension cables to extend distances between lights, or the included Y branch connector to branch your sytem in two directions. Add additional cable extensions id needed. Please watch the Easy Installation Video, or consult your owners manual for additional information.