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
Félix Candela 300 works and 900 projects in this time period. Many of his larger projects were given to him by the Mexican government, such as the Cosmic Rays Pavilion. In 1956, Mexican President Adolfo Ruiz Cortines said “Nothing could be more serious than to sit in the shade of the buildings we are about to build,” foreshadowing the many construction projects to come. Ruiz Cortines came up with a budget to enable his construction declaration to come true, requesting ₱81,200,000 (pesos) more funding than was used in 1955. Luckily for Candela, ₱20,300,000 (pesos) of this funding was to go towards public