Several years ago we developed the worlds best ultraviolet (UVB and UVA) reptile bulbs in the industry in a variety of different wattages and UV-producing levels. (I developed the very first Mega-Ray® in my shop while working on ultraviolet curing lamps.) These lamps have proven to be exceptional for developing 25-OH vitamin D3 for optimal health and for the treatment of metabolic bone disease (Metabolic Bone Disease). The educated herpetologist, hobbyist, and independent researchers have made this bulb the leading source of UV for reptile health internationally.