What is the lift-to-weight ratio during takeoff for an ultralight?
Your (lift to weight ratio) load factor is less then 1 during climb. 

In a climb or descend only some of the weight is counterbalanced by lift, another part is counterbalanced by thrust. So lift is less then weight in a steady climb. (But Thrust is greater then drag) To calculate the exact Lift to weight ratio we will need more information.