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Illumination Parameters

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Contents of the Advanced Illumination PDF

List of 16 Advanced Illumination Formulas

Beer-Lambert Law

Fresnel's Law of Reflection

Illumination by Lambert Cosine Law

Incident Angle using Snell's Law

Intensity of Light Transmitted

Inverse Square Law

Lambert's Cosine Law

Luminance for Lambertian Surfaces

Luminous Intensity

Number of Floodlighting Units

Refracted Angle using Snell's Law

Specific Consumption

Spectral Luminous Efficacy

Spectral Reflection Factor

Spectral Transmission Factor

Utilization Factor of Electrical Energy

Variables used in Advanced Illumination PDF

A_light Area to be Lighted (Square Meter)
c Concentration of Absorption Material
CP Candle Power (Candela)
d Distance (Meter)
E_v Illumination Intensity (Lux)
E_θ Illuminance at Angle of Incidence
G_λ Spectral Irradiation
I_o Intensity of Light Entering the Material (Candela)
I_t Intensity of Transmitted Light (Candela)
I_v Luminous Intensity (Candela)
J_λ Reflected Spectral Emission
J_λ' Transmitted Spectral Emission
K_m Maximum Sensitivity (Lumen Per Watt)
K_λ Spectral Luminous Efficacy (Lumen Per Watt)
L Length of Illumination (Meter)
L_e Lumen Emitting from Source (Candela)
L_r Lumen Reaching Working Plane (Candela)
L_v Luminance (Candela Steradian per Sq Meter)
Lm Lumen (Candela Steradian)
N Number of Floodlighting Units
n₁ Refractive Index of Medium 1
n₂ Refractive Index of Medium 2
P_in Input Power (Watt)
P_λ Spectral Reflection Factor
r_λ Reflection Loss
S.C. Specific Consumption
T_λ Spectral Transmission Factor
UF Utilization Factor
V_λ Photopic Efficiency Value
x Path Length (Meter)
α Absorption Coefficient
β Absorption per Concentration Coefficient
θ Illumination Angle (Degree)
θ_i Incident Angle (Degree)
θ_r Refracted Angle (Degree)
Φ_B Lumen Flux (Lumen)
ω Solid Angle (Steradian)

Constants, Functions and Measurements used in Advanced Illumination PDF

Constant: pi, 3.14159265358979323846264338327950288
Archimedes' constant
Function: arcsinh, arcsinh(Number)
The inverse hyperbolic sine function, also known as the arcsinh function, is the inverse function of the hyperbolic sine function.
Function: cos, cos(Angle)
Cosine of an angle is the ratio of the side adjacent to the angle to the hypotenuse of the triangle.
Function: exp, exp(Number)
n an exponential function, the value of the function changes by a constant factor for every unit change in the independent variable.
Function: sin, sin(Angle)
Sine is a trigonometric function that describes the ratio of the length of the opposite side of a right triangle to the length of the hypotenuse.
Function: sinh, sinh(Number)
The hyperbolic sine function, also known as the sinh function, is a mathematical function that is defined as the hyperbolic analogue of the sine function.
Measurement: Length in Meter (m)
Length Unit Conversion
Measurement: Luminous Intensity in Candela (cd)
Luminous Intensity Unit Conversion
Measurement: Area in Square Meter (m²)
Area Unit Conversion
Measurement: Illuminance in Lux (lx), Candela Steradian per Sq Meter (cd*sr/m²)
Illuminance Unit Conversion
Measurement: Power in Watt (W)
Power Unit Conversion
Measurement: Angle in Degree (°)
Angle Unit Conversion
Measurement: Luminous Flux in Candela Steradian (cd*sr), Lumen (lm)
Luminous Flux Unit Conversion
Measurement: Luminous Efficacy in Lumen Per Watt (lm/W)
Luminous Efficacy Unit Conversion
Measurement: Solid Angle in Steradian (sr)
Solid Angle Unit Conversion

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