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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
Enter f to specify the perceived power in a luminous flux value.
If you enter i, you can specify the intensity of the light based on an illuminance
value.
The illuminance value can be specified in either lux or foot-candles. Enter d
to specify a distance to use to calculate illuminance.
Color Specify the color of the light based on a color name or a Kelvin
temperature. Enter ? to display a list of color names.
Enter a text string using wild card characters to display a partial listing of color
names, or an asterick (*) to display all the possible choices.
If you enter k, you can specify the color of the light based on a Kelvin
temperature value.
Shadow
Makes the light cast shadows.
Off Turns off display and calculation of shadows for the light. Turning shadows
off increases performance.
Sharp Displays shadows with sharp edges. Use this option to increase
performance.
Soft Mapped Displays realistic shadows with soft edges.
Specifies the amount of memory that should be used to calculate the shadow
map.
Specifies the softness to use to calculate the shadow map.
Color/Filter Color
Controls the color of the light.
True Color Specifies a True Color. Enter in the format R,G,B (red, green, blue).
Index Specifies an ACI (AutoCAD Color Index) color.
654 | Chapter 5 D Commands