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footcandles x 20%= micromols
footcandles x 10.76 = lux
(footcandles x 20%) / 4.57 = watts per sq meter
watts per sq meter = micromols / 4.57
micromols x 54 = lux
PPF = photosynthetic photon flux = micromols = PAR
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GH70
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Nanometers
Term
280 - 315
Ultra Violet
315 - 400
400 - 520
520 - 610
610 - 750
750 - 1000
1000 +
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Effects
small influence on morphogenetic and physiologic
processes, bleaches colors, causes sunburn,
causes some fungus sporolation
Ultra Violet - Blue slight absorption by chlorophyll, influence on
photoperiodism, inhibition of cell elongation,
sunburn, causes some fungus sporolation
Blue
high absorption by chlorophyll and carotenoids,
big influence on photosynthesis
Green
low absorption by pigments
Red
low absorption by chlorophyll, big influence on
photosynthesis and photoperiodism, blocking may
slow stretch
Far Red
low absorption, stimulation of cell elongation,
influence on flowering and germination, blocking
may slow stretch
Infra-Red
HEAT - energy absorbtion is converted into heat
Foot candles
Lux
micromols
Wat t s per sq met er
100
1076
20
4.38
500
5380
100
21.88
750
8070
150
32.82
1000
10760
200
43.76
1250
13450
250
54.70
Foot candles
Lux
micromols
Wat t s per sq met er
1500
16140
300
65.65
2000
21520
400
87.53
2500
26900
500
109.41
5000
53800
1000
218.82
10000
107600
2000
437.64
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