2012

If the LIGHTINGUNITS system variable is set to 0, the following prompt is
displayed:
Enter an option to change [Name on page 1919/Intensity on page 1919/Status on
page 1919/
shadoW on page 1920/Attenuation on page 1920/Color on page 1921/eXit
on page 1921] <eXit>:
If the LIGHTINGUNITS system variable is set to 1 or 2, the following prompt
is displayed:
Enter an option to change [
Name on page 1919/Intensity factor on page 1919/Status
on page 1919/Photometry on page 1919/shadoW on page 1920/Attenuation on page
1920/
filterColor on page 1921/eXit on page 1921] <eXit>:
NOTE When the LIGHTINGUNITS system variable is set to 1 or 2, the Attenuation
option has no affect on the creation of the light. It is only maintained for scripting
compatibility.
Name
Specifies the name of the light.
Intensity/Intensity Factor
Sets the intensity or brightness of the light.
Status
Turns the light on and off.
Photometry
Photometry is available when the LIGHTINGUNITS system variable is set to
1 or 2. Photometry is the measurement of the luminous intensities of visible
light sources.
In photometry, luminous intensity is a measure of the perceived power emitted
by a light source in a particular direction. Luminous flux is the perceived
power per unit of solid angle. The total luminous flux for a lamp is the
perceived power emitted in all directions. Luminance is the total luminous
flux incident on a surface, per unit area.
Intensity Enter an intensity value in candelas, the perceived power in a
luminous flux value, or illuminance value for the total luminous flux incident
on a surface.
■ Candela (symbol: cd) is the SI unit of luminous intensity (perceived power
emitted by a light source in a particular direction). Cd/Sr
■ Lux (symbol: lx) is the SI unit of illuminance. Lm/m^2
■ Foot-candle (symbol: fc) is the American unit of illuminance. Lm/ft^2
TARGETPOINT | 1919