Light Calculations

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Answer

Approximate Lumen Output = Candle Power X 12.57

Footcandles X 10.764 = Lumens / Square Meter = Lux

Lumens X .07958 = Spherical Candle Power

Lux X .0929 = Foot Candles

Power Calculations

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Answer

Power = Voltage X Current

Watts = Volts X Amps

Current = Power / Voltage

Amps = Watts / Volts

Unit Conversions

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Answer

Inches = Millimeters / 25.4

Millimeters = Inches X 25.4

Feet = Meters / .3048

Meters = Feet X .3048

Centigrade = .556 X (Fahrenheit – 32)

Fahrenheit = 1.8 X (Centigrade + 32)

Voltage Drop Calculations

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Answer

Calculation: V = I x L x (R/1000) x 1.004

V = Voltage Drop

I = Current

L = Length of Conductor in Feet

R = Resistance of Conductor per 100 Feet

  • R / 18awg = 6.51
  • R / 16awg = 4.09
  • R / 14awg = 2.58
  • R / 12awg = 1.62
  • R / 10awg = 1.02
  • R /   8awg = 0.64