LO-PRO Large Junction Box with Double VLM Driver Combo - 12V 60W Includes 1 (quantity) Junction box, and 2 (quantity) 60W, 12V, VLM Drivers The VLM Series LED Driver is the highest efficiency LED power supply with the smallest footprint. THERMAL EFFICIENCY DEFINED: VLM Series LED Drivers are potted with precision to conduct heat more uniformly to the bottom and the body of the driver.