Candela was chosen so that the new definition would precisely match the old definition. Although the candela is now defined in terms of the second (an SI base unit) and the watt (a derived SI unit), the candela remains a base unit of the SI system, by definition. If a source emits a known luminous intensity "I" (in candelas) in a well-defined cone, the total luminous flux "Φ" in lumens is given by where "A" is the "radiation angle" of the lamp—the full vertex angle of the emission cone. For example, a lamp that emits 590 cd with a radiation angle
Candela Corp Candela Corp Candela Laser Corporation is an American laser company that develops and sells medical lasers for cosmetic use located in Wayland, Massachusetts. Candela Laser Corporation was founded in 1970. Candela has begun to extend its technology to treat a wider range of cosmetic conditions including the treatment of acne and acne scars, minor wrinkles, and even hair removal. This effort is part of a broader campaign to capture a larger market share of the growing cosmetic surgery industry in the United States and abroad. The company has made an effort to promote laser treatment as a safe and easy