ld_data: Lighting Distribution Data Set
In Wei-Lim/lighting: Lighting Tools

ld_data

R Documentation

Lighting Distribution Data Set

Description

Contains data of an example lighting distribution in list format. This list format is mainly based on the description of the EULUMDAT format (see definition in EN, in DE). Some additional features have been introduced, to allow the dataset to be compatible with the IES (LM63-2002) format.

Usage

ld_data

Format

A wide format data frame with 15 variables:

filepath: Path to LDT-file
file_name: Name of LDT-file without extension
company: Company identification/databank/version/format identification
Ityp: Type indicator
Isym: Symmetry indicator
Mc: Number of C-planes between 0 and 360 degrees
Dc: Distance between C-planes
Ng: Number of luminous intensities in each C-plane
Dg: Distance between luminous intensities per C-plane
report_no: Measurement report number
luminaire_name: Luminaire name
luminaire_no: Luminaire number
file_name_ldt: File name written in LDT-file
date_user: Date/user
length: Length/diameter of luminaire (mm)
width: b - Width of luminaire (mm) (b = 0 for circular luminaire)
height: Height of luminaire (mm)
length_lum: Length/diameter of luminous area (mm)
width_lum: b1 - Width of luminous area (mm) (b1 = 0 for circular luminous area of luminaire)
height_lum_C0: Height of luminous area C0-plane (mm)
height_lum_C90: Height of luminous area C90-plane (mm)
height_lum_C180: Height of luminous area C180-plane (mm)
height_lum_C270: Height of luminous area C270-plane (mm)
DFF: Downward flux fraction (%)
LORL: Light output ratio luminaire (%)
cf: Conversion factor for luminous intensities (depending on measurement)
tilt: Tilt of luminaire during measurement (road lighting luminaires)
lamp_standard_sets_no: n - Number of standard sets of lamps (optional, also extendable on company-specific basis). For absolute photometry, this value is 1.
lamp_no: Number of lamps. For absolute photometry, number is negative.
lamp_type: Type of lamps
lum_flux: Total luminous flux of lamps (lm). For absolute photometry, this field is Total Luminous Flux of Luminaire.
cct: Color appearance / color temperature of lamps
cri: Color rendering group / color rendering index
power: Wattage including ballast (W)
DR: Direct ratios for room indices k = 0.6 ... 5 (for determination of luminaire numbers according to utilization factor method)
angle_C: Angles of C-planes (beginning with 0 degrees, horizontal)
angle_G: Gamma angles (beginning with 0 degrees, vertical)
lum_int_tbl: Luminous intensity tibble as a function of C-angle and G-angle. Dependent on light distribution symmetry (Isym)
lum_int_extended_tbl: Luminous intensity tibble extended by given C- and G-angles. For Plots, Calculation and Conversion.
test_lab: Photometric testing laboratory
photometry_type: 1 = C, 2 = B, 3 = A
ballast_factor: Ballast factor (ballast efficiency)
plot: Light distribution polar chart in ggplot2 format. After read_ldt() process, initally empty using read_ldt(). Added by using ld_add_light_distribution_plot()