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Outdoor Lighting and Crime - Amper

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FIGURE 9. UCR CRIME AND UPWARD LIGHT ENERGY LOSS<br />

PER PERSON IN USA CITIES<br />

UCR CRIME RATE %<br />

16<br />

14<br />

12<br />

10<br />

8<br />

6<br />

4<br />

2<br />

0<br />

y = 0.042x + 6.2702<br />

r 2 = 0.4589<br />

0 20 40 60 80 100 120 140 160<br />

ANNUAL LIGHT ENERGY LOSS PER PERSON, kW.h<br />

Figure 9. UCR Index <strong>Crime</strong> Rate for 21 USA cities plotted against annual upward light<br />

energy loss per person derived from satellite observations in 1997 (Isobe <strong>and</strong> Hamamura<br />

1998), with estimated corrections to no-snow conditions for Minnesota, St Louis, Kansas City<br />

MO, Buffalo <strong>and</strong> Denver. The regression line slope is reliably different from zero (p < 0.05).<br />

Corresponding numerical data, without <strong>and</strong> with the corrections for snow, are in Tables 5 <strong>and</strong><br />

6.<br />

176

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