2012

List of Prompts
The following prompts are displayed.
Specify source location <0,0,0>: Enter coordinate values or use the pointing device
Specify target location <1,1,1>: Enter coordinate values or use the pointing device
Enter an option to change [
Name on page 2100/Intensity factor on page 2100/Status
on page 2100/Photometry on page 2100/weB on page 2101/shadoW on page
2101/
filterColor on page 2102/eXit on page 2102] <eXit>:
NOTE The LIGHTINGUNITS system variable must be set to a value other than 0
to create and use weblights.
Name
Specifies the name of the light.
Intensity Factor
Sets the intensity or brightness of the light.
Status
Turns the light on and off. If lighting is not enabled in the drawing, this setting
has no effect.
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 in 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
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.
2100 | Chapter 23 W Commands