Illuminance plot and photometry table for a luminaire

Photometry file (*.ies, *.ldt, *.eld) URL:

   or change Parameters:
assume a row of luminaires spaced:  heights
include a scale on the right margin
rotate plot: degrees (clockwise as +)
luminaire at height of  m (set the lamp flux as  lm)
Image height (pixels - 1)
start with summary results
  incl. explanation on pollution by rays between 90 and 105 degrees
save parameters    use my saved settings

Another parameters can be given at command line (ev. overriding all previous data):

(see ev. their overview).   

No file name given, showing results from a previous run:

illuminance plot Go to a readable photometry table
See the directory including the data in the other format
illuminance scale

Values below the scale are illuminance / 1 lx. Default (unrealistic) “unit” case is for luminaire being point-like, just 1 m over the terrain and containing a lamp producing exactly 1 klm. A realistic height can be given as a parameter, then the lamp flux given in the photometric file is used, if not overriden by a parameter.

If a continuous row of luminaires is computed, the result is shown at the left side. At the right side, illuminance produced by a single luminaire remains. Default spacing of luminaires is five pole heights. White marks are spaced one pole height, marks on axes are five times denser (0.2 height).