New USP-AI series clever 120W 240W led develop gentle calories delivery Samsung LM281B+ LM301B LM301H Board driving force with Dimmer Knob Input AC 100V~240V 50/60Hz Constant Current Output: 120w: 2500mA ; 240w : 5000mA (adjustable) Output DC 30V-54V 0-10V dimmer inside, may perhaps switch OFF 120W edition , 2 30-54V ; Model : USP-150-AI-B 240W edition , 5A 40-54V ; Model : USP-240-AI-B