This is an ultra slim design at only 8mm deep and is a really neat unit at just 20cm square. It has a high quality acrylic viewing area, which is perfect for viewing slides, negatives or for tracing over images, for those artists amongst you. The light is daylight colour balanced which ensures that the details on the items being viewed are kept true to the original. It can be used as a back light for photographers who need an extra angle of light, as it has a mains adapter lead, which makes it more versitile than a viewing box. The energy saving LED lights are dimmable, which means items can be viewed for longer periods, without incurring eye strain. The colour rendering index Ra is >90 and the light tablet comes with a protective cover.