Convert Lumens per square yard to Foot-candles

Convert Lumens per square yard (lm/yd²) to Foot-candles (fc) instantly and accurately.

Lumens per square yard (lm/yd²)
Foot-candles (fc)

Conversion Formula

fc = lm/yd² × 0.1111111111

About Lumens per square yard

The lumen per square yard (lm/yd²) equals 1/0.83612736 lx ≈ 1.196 lx. Used occasionally in UK outdoor area lighting specifications alongside foot-candles. A 3 lx minimum car-park standard equals ~2.5 lm/yd²; a 100 lx sports-field requirement ~84 lm/yd². 1 lm/yd² = 1/0.83612736 lx.

About Foot-candles

The foot-candle (fc) equals 1 lm/ft² ≈ 10.764 lx. Standard in North American lighting design: IESNA recommends 30-50 fc for general offices, 50-100 fc for retail displays, 12-16 fc for cinema screens. Still the dominant unit in the US, Canada and some other countries. 1 fc = 1/0.09290304 lx.

Quick Reference Table

Lumens per square yard (lm/yd²)Foot-candles (fc)
1 lm/yd²0.111111 fc
2 lm/yd²0.222222 fc
5 lm/yd²0.555556 fc
10 lm/yd²1.11111 fc
25 lm/yd²2.77778 fc
50 lm/yd²5.55556 fc
100 lm/yd²11.1111 fc

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