This step down transformer / converter is for use with the Ideal-Lume PRO Lights in 220/240VAC countries. It converts 220/240VAC electricity to 110/120V AC at 50 or 60Hz and supports up to 200W draw so it is more than sufficient for all of the Ideal-Lume Pro Bias Lights. This is not needed for the Ideal-Lume Standard or Ideal-Lume panelights as we offer those in a 220V option.