GSA
Courtroom Lighting Criteria Evaluation
Task 1 Report
6
Comparative Analysis
This section of the report presents tables comparing the surveyed courtrooms. Aspects of
the courtrooms that are compared are illuminance levels, lighting power density, and the
subjective qualities of the Design Guide and IESNA Handbook guidelines.
New York, NY
Montgomery, AL
Central Islip, NY
Tallahassee, FL
Tallahassee, FL
Tampa, FL
Tampa, FL
Columbia, SC
Corrected with uplighting
Original design
Compact Florescent Lamps
Original Metal Halide
Vertical Illuminance (Fc)
Vertical Illuminance (Fc)
Vertical Illuminance (Fc)
Vertical Illuminance (Fc)
Vertical Illuminance (Fc)
Vertical Illuminance (Fc)
Vertical Illuminance (Fc)
Vertical Illuminance (Fc)
Horizontal Illuminance (Fc)
Horizontal Illuminance (Fc)
Horizontal Illuminance (Fc)
Horizontal Illuminance (Fc)
Horizontal Illuminance (Fc)
Horizontal Illuminance (Fc)
Horizontal Illuminance (Fc)
Horizontal Illuminance (Fc)
120
120
120
120
120
120
120
120
110
110
110
110
110
110
110
110
100
100
100
100
100
100
100
100
90
90
90
90
90
90
90
90
80
80
80
80
80
80
80
80
70
70
70
70
70
70
70
70
60
60
60
60
60
60
60
60
50
50
50
50
50
50
50
50
40
40
40
40
40
40
40
40
30
30
30
30
30
30
30
30
20
20
20
20
20
20
20
20
10
10
10
10
10
10
10
10
0
0
0
0
0
0
0
0
LPD w/sf
3.6
LPD w/sf
3.2
LPD w/sf
2.9
LPD w/sf
5.3
LPD w/sf
4.0
LPD w/sf
5.3
LPD w/sf
4.3
LPD w/sf
4.5
Limit w/sf
1.9
Limit w/sf
1.9
Limit w/sf
1.9
Limit w/sf
1.9
Limit w/sf
1.9
Limit w/sf
1.9
Limit w/sf
1.9
Limit w/sf
1.9
1
2
3
4
5
1
2
3
4
5
1
2
3
4
5
1
2
3
4
5
1
2 3
4
5
1
2
3
4
5
1
23
4
5
1
32
4
5
Subjective Rating
Subjective Rating
Subjective Rating
Subjective Rating
Subjective Rating
Subjective Rating
Subjective Rating
SuveeRtating
bj c i
5
5
5
5
5
5
5
5
4
4
4
4
4
4
4
4
3
3
3
3
3
3
3
3
2
2
2
2
2
2
2
2
1
1
1
1
1
1
1
1
Satisfaction?
Satisfaction?
Satisfaction?
Satisfaction?
Satisfaction?
Satisfaction?
Satisfaction?
Satisfaction?
NY
NY
NY
NY
NY
NY
NY
NY
Table 2 - Comparative Analysis Chart
The subjective ratings at the bottom of the chart are on a 1 to 5 scale, with 5 being the
Courtroom graphs with this symbol
have daylight available in the courtrooms
best. The ratings are based on a comparison of the courtrooms and by looking at all of the
illuminance, luminance, and LPD data to summarize the success or failure of each courtroom.
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Issue March 1, 2006
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