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
Paco Candela Paco Candela Francisco 'Paco' Antonio Candela Pascual (born 19 January 1993) is a Spanish footballer who plays for Hércules CF. Mainly a central defender, he can also play as a defensive midfielder. Born in Alicante, Valencian Community, Candela graduated with Villarreal CF's youth setup, and made his senior debuts with the C-team in the 2011–12 campaign, in Tercera División. On 20 August 2013 he moved to Segunda División B's CD Leganés, featuring in 29 matches during his first season, which ended in promotion. On 6 August 2014 Candela signed a new two-year deal with the Madrid side. On 11 September