This affordable light box emits diffuse light through the large front panel (12' x 15'). The panel is elevated, making it very comfortable and pleasant to use while reading, eating, etc. The unit is bright, delivering 10,000 lux at a distance of 17 inches. Will work with household voltages around the world without requiring a transformer. The UV is filtered. All-metal quality construction CSA safety approved unit (Canadian Standards Association) Electronically powered - no flicker & no hum No UV & no magnetic field Power : Universal - Lamp automatically selects from 110-270 volts, 50 or 60 hz.