The Judge II-S color light box has a unique patented 7-phosphor daylight lamps provide the most accurate, long-lasting fluorescent daylight simulator available. Judge II-S Features > 5 Light Sources Included: 1.Daylight (D50),(D65),(D75) 2.Fluorescent (TL84 or U30) 3.cool white fluorescent (CWF) 4.Incandescent (a typical home light bulb) 5.UV alone for detecting optical brightening & fluorescent whitening UV blended with daylight - simulating natural sunlight > Sidewalls Included > Elapsed time meter indicating lamp replacement > Meets or exceeds major international standards for visual color evaluation ASTM D1729, ISO 3664, DIN, ANSI & BSI Judge II-S Dimensions Dimensions: 21.85" H x 26.5" W x 20.5" D Weight: 50 lbs. The Judge II-S color assessments conforms with or exceed all major international standards for the visual evaluation of color. These include ASTM D 1729 for visual evaluation of color differences of opaque materials, ISO 3664 for illumination conditions for viewing color reproductions, as well as DIN, ANSI, and BSI standards. These viewing booths also eliminate color communication errors by providing a low gloss, neutral gray (Munsell N7) surround that is shielded from ambient light.