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
What Does It Take (To Win Your Love) What Does It Take (To Win Your Love) "What Does It Take (To Win Your Love)" is a 1968 song that was a 1969 hit single by Jr. Walker & The All Stars. The single was one of Jr. Walker's most successful releases, becoming a hit on both the R&B and pop singles charts. "What Does It Take (To Win Your Love)," written by Johnny Bristol, Harvey Fuqua, and Vernon Bullock, made it into the top five on the Hot 100, and became Jr. Walker's second number one on the R&B charts. The song was also a hit in the