Product Description Power factor: > 99%; THD: <10% 3 year factory warranty Runs on 220/240 volt power, 50/60hertz Suitable for HPS and MH bulb of America and Europe Standard Usage temperature:-30 to 50 degree C Unique housing surface withothout screws Patented 9 sided extruded housingdissipates heat A special side of housing to show your brand by label or print CE, FCC, ETL are available Product Specification/Models 250W,400W,600W Caution: Only professional allowed to do below operation Before assembly&maintenance, please make sure the power is cut off Before fixing cord, check if voltage is ok and check cable before other cables The product can just work with HPS&MH lamps only The product for indoor use only