designer's own words:a door is the transition between two spaces, from in to out or here to there. this door does more than divide space - it is a source of light for a home interior that is as healthy as it is enjoyable to look at. the natural full-spectrum fluorescent light bulbs provide a CRI (color rendering index) of 93 - comparible to midday sun. these bulbs help prevent fatigue, aid in concentration, and can also reduce SAD (seaonal affective disorder). luminate brings the health and happiness of the sun's rays into the home.