Foot-candle, a unique unit of measure in lighting, represents the amount of light that falls on a surface one foot away from a standard candle. It’s particularly fascinating because it ties in with history as well as science, dating back to a time when candles were a primary light source. In modern context, though obsolete in many fields, the foot-candle gauge is still significant in industries like photography, cinematography, and agriculture, where precise lighting conditions are crucial.
Interestingly, foot-candles are often used in architectural lighting design to ensure spaces are both functional and aesthetically pleasing. For example, an office space might need an optimal range of 30-50 foot-candles to facilitate comfortable working conditions. Despite the prevalence of the metric system today, the foot-candle remains a testament to how traditional units still find relevance in today’s world.
Lux is a unit of illuminance used to measure the amount of light that falls on a surface. It plays a crucial role in fields such as architecture, photography, and horticulture, ensuring optimal lighting conditions. For context, a typical sunny midday might measure around 100,000 lux, while a full moon can cast a serene 0.1 lux. This wide range demonstrates the versatility and importance of this unit in capturing the subtleties of natural and artificial lighting.
Interestingly, lux is part of everyday life domains we might take for granted, such as designing workplaces to ensure productivity levels are maximized with the right lighting, set between 500 and 1000 lux. It also helps in monitoring light pollution in urban areas to protect our night skies. Understanding lux enhances our appreciation and use of light in our daily activities.
Foot-candles | Lux |
---|---|
0
ft-cd
|
0
lx
|
10
ft-cd
|
107.6391
lx
|
20
ft-cd
|
215.2782
lx
|
30
ft-cd
|
322.9173
lx
|
40
ft-cd
|
430.5564
lx
|
50
ft-cd
|
538.1955
lx
|
60
ft-cd
|
645.8346
lx
|
70
ft-cd
|
753.4737
lx
|
80
ft-cd
|
861.1128
lx
|
90
ft-cd
|
968.7519
lx
|
100
ft-cd
|
1076.391
lx
|
110
ft-cd
|
1184.0301
lx
|
120
ft-cd
|
1291.6692
lx
|
130
ft-cd
|
1399.3083
lx
|
140
ft-cd
|
1506.9474
lx
|
150
ft-cd
|
1614.5865
lx
|
160
ft-cd
|
1722.2256
lx
|
170
ft-cd
|
1829.8647
lx
|
180
ft-cd
|
1937.5038
lx
|
190
ft-cd
|
2045.1429
lx
|
200
ft-cd
|
2152.782
lx
|
210
ft-cd
|
2260.4211
lx
|
220
ft-cd
|
2368.0602
lx
|
230
ft-cd
|
2475.6993
lx
|
240
ft-cd
|
2583.3384
lx
|
250
ft-cd
|
2690.9775
lx
|
260
ft-cd
|
2798.6166
lx
|
270
ft-cd
|
2906.2557
lx
|
280
ft-cd
|
3013.8948
lx
|
290
ft-cd
|
3121.5339
lx
|
300
ft-cd
|
3229.173
lx
|
310
ft-cd
|
3336.8121
lx
|
320
ft-cd
|
3444.4512
lx
|
330
ft-cd
|
3552.0903
lx
|
340
ft-cd
|
3659.7294
lx
|
350
ft-cd
|
3767.3685
lx
|
360
ft-cd
|
3875.0076
lx
|
370
ft-cd
|
3982.6467
lx
|
380
ft-cd
|
4090.2858
lx
|
390
ft-cd
|
4197.9249
lx
|
400
ft-cd
|
4305.564
lx
|
410
ft-cd
|
4413.2031
lx
|
420
ft-cd
|
4520.8422
lx
|
430
ft-cd
|
4628.4813
lx
|
440
ft-cd
|
4736.1204
lx
|
450
ft-cd
|
4843.7595
lx
|
460
ft-cd
|
4951.3986
lx
|
470
ft-cd
|
5059.0377
lx
|
480
ft-cd
|
5166.6768
lx
|
490
ft-cd
|
5274.3159
lx
|
500
ft-cd
|
5381.955
lx
|
510
ft-cd
|
5489.5941
lx
|
520
ft-cd
|
5597.2332
lx
|
530
ft-cd
|
5704.8723
lx
|
540
ft-cd
|
5812.5114
lx
|
550
ft-cd
|
5920.1505
lx
|
560
ft-cd
|
6027.7896
lx
|
570
ft-cd
|
6135.4287
lx
|
580
ft-cd
|
6243.0678
lx
|
590
ft-cd
|
6350.7069
lx
|
600
ft-cd
|
6458.346
lx
|
610
ft-cd
|
6565.9851
lx
|
620
ft-cd
|
6673.6242
lx
|
630
ft-cd
|
6781.2633
lx
|
640
ft-cd
|
6888.9024
lx
|
650
ft-cd
|
6996.5415
lx
|
660
ft-cd
|
7104.1806
lx
|
670
ft-cd
|
7211.8197
lx
|
680
ft-cd
|
7319.4588
lx
|
690
ft-cd
|
7427.0979
lx
|
700
ft-cd
|
7534.737
lx
|
710
ft-cd
|
7642.3761
lx
|
720
ft-cd
|
7750.0152
lx
|
730
ft-cd
|
7857.6543
lx
|
740
ft-cd
|
7965.2934
lx
|
750
ft-cd
|
8072.9325
lx
|
760
ft-cd
|
8180.5716
lx
|
770
ft-cd
|
8288.2107
lx
|
780
ft-cd
|
8395.8498
lx
|
790
ft-cd
|
8503.4889
lx
|
800
ft-cd
|
8611.128
lx
|
810
ft-cd
|
8718.7671
lx
|
820
ft-cd
|
8826.4062
lx
|
830
ft-cd
|
8934.0453
lx
|
840
ft-cd
|
9041.6844
lx
|
850
ft-cd
|
9149.3235
lx
|
860
ft-cd
|
9256.9626
lx
|
870
ft-cd
|
9364.6017
lx
|
880
ft-cd
|
9472.2408
lx
|
890
ft-cd
|
9579.8799
lx
|
900
ft-cd
|
9687.519
lx
|
910
ft-cd
|
9795.1581
lx
|
920
ft-cd
|
9902.7972
lx
|
930
ft-cd
|
10010.4363
lx
|
940
ft-cd
|
10118.0754
lx
|
950
ft-cd
|
10225.7145
lx
|
960
ft-cd
|
10333.3536
lx
|
970
ft-cd
|
10440.9927
lx
|
980
ft-cd
|
10548.6318
lx
|
990
ft-cd
|
10656.2709
lx
|
1000
ft-cd
|
10763.91
lx
|
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