Acessorize your light mover by adding a second lamp using only one motor. By adding a 3' rail, pushrod and a trolley. you will turn your 6' rail into a 9' using the push rod to push and pull the second light with the 10 rpm or 6 rpm motor. Use the robostick light stabilizers on both ends to keep the lights from swaying. Add-a-lamp kit includes the 3' extension rail and push rod. buy the auxiliary trolley and robostick light stabilizers separately. Robostick keeps the lights from swinging, allowing for more direct light growth. the auxiliary trolley is pulled by the intellidrive motor making for a 'type movement.