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
The Measure of a Man: A Spiritual Autobiography life. Poitier explores the nature of sacrifice and commitment, price and humility, rage and forgiveness, and paying the price for artistic integrity. What emerges is a picture of a man in the face of limits; his own as well as the world's. The translation in complicated Chinese () of this autobiography was done by Fongfong Olivia Wei, and published by Triumph Publishing Company in Taipei, Taiwan, in the year 2002. The Measure of a Man: A Spiritual Autobiography The Measure of a Man: A Spiritual Autobiography is an autobiographical work by Sidney Poitier. On January 26, 2007, Oprah Winfrey chose