ILLUMINANCE TABLES - (Imperial and Metric)
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ILLUMINANCE TABLES REF-002.TXT
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A. INTENSITY, DISTANCE & ILLUMINANCE - IMPERIAL
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DISTANCE ILLUMINANCE (FC)
in
Feet 25 50 75 100 125 150
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10 2,500 5,000 7,500 10,000 12,500 15,000
20 10.000 20,000 30,000 40,000 50,000 60,000
30 22,500 45,000 67,500 90,000 112,500 135,000
40 40,000 80,000 120,000 160,000 200,000 240,000
50 62,500 125,000 187,500 250,000 312,500 375,000
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60 90,000 180,000 270,000 360,000 450,000 540,000
70 122,500 245,000 367,500 490,000 612,500 735,000
80 160,000 320,000 480,000 640,000 800,000 960,000
90 202,500 405,000 607,500 810,000 1,012,500 1,215,000
100 250,000 500,000 750,000 1,000,000 1,250,000 1,500,000
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B. INTENSITY, DISTANCE & ILLUMINANCE - METRIC
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DISTANCE ILLUMINANCE (Lux)
in
Meters 250 500 750 1000 1250 1500
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1 250 500 700 1,000 1,250 1,500
2 1,000 2,000 3,000 4,000 5,000 6,000
4 4,000 8,000 12,000 16,000 20,000 24,000
8 16,000 32,000 48,000 64,000 80,000 96,000
10 25,000 50,000 75,000 100,000 125,000 150,000
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15 56,250 112,500 168,750 225,000 281,250 337,500
20 100,000 200,000 300,000 400,000 500,000 600,000
25 156,250 312,500 468,750 625,000 781,250 937,500
30 225,000 450,000 675,000 900,000 1,125,000 1,350,000
35 306,250 612,500 918,750 1,225,000 1,531,250 1,837,500
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CONVERSIONS:
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To convert from FC to LUX (or LUX to FC):
LUX x .0929 = FC FC x .10.76 = LUX
(500 LUX = 46 FC) (50 FC = 538 LUX)
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(c) 1999 by Bill Williams