isofootcandle

isofootcandle

[¦ī·sō′fu̇t‚kand·əl]
(optics)
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1 for the correlating location on an Isofootcandle Plot.
The subtle variations in these two isofootcandle footprints are based on differences in lamp configuration only.
The isofootcandle plots graphically represent the luminaire's lighting pattern, in illuminance, striking a horizontal surface.
EXAMPLE MAXIMUM CANDELA POINT and lateral angle line is included here to illustrate how illumination levels at a point correlate the Isofootcandle Plot information shown.
1fc Isofootcandle contour lines (at a 14' Mounting Height).
During the Schematic Design phase of a project, rough luminaire layouts can be created using isofootcandle plots.
0fc isofootcandle trace crosses the Reference Line, to establish the maximum single fixture distance to the site perimeter (1.
By overlaying Isofootcandle Plots, a rough idea of illuminances can be accomplished by adding the values of each contour where they intersect (figure 11.