Plant Lighting
Semjon Reimer
Agenda
1.
2.
3.
Introduction
Photosynthesis
Lamps
3.1 Incandescent Light
3.2 MH Lamps
3.3 HPS Lamps
3.4 Fluorescent Plant Grow Lamps
3.5 Induction Plant/Grow Lamps
3.6 Led
4.
Applications
4.1 Ebay examples
4.2 Amazon examples
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1.Introduction
Global radiation:
Incoming solar radiation
Reflected by clouds, atmosphere
and surface
100 W/m2
Absorbed by surface
Absorbed by atmosphere
162 W/m2
78 W/m2
340 W/m2
Mechanismen on earth caused by Global radiation: Photosynthesis
Water evaporation
Melt snow and ice
Warms the Earth
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1.Introduction
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1.Introduction
Human eye see only visible part of electromagnetic radiation (380-780 nm)
Intensity of visible light is expressed in lux (lm/m2 = lux)
Sensitivity of human eye is at 555 nm (green/yellow)
Plant have two range of sensitivity:
blue part 430-460 nm
red part 640-670 nm
Light sensitivity curve
of the human eye
Light sensitivity curve
of plants
Photosynthetic Photon Flux = PPF
Photons between 400‐700 nm
The higher the PPF value per Watt, the more efficient the light source
for plant growth.
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2. Photosynthesis
6CO2
Carbon dioxide
+ 6H2O
Light
Water
‐Chlorophyl a: 430 nm and 662 nm
‐Chlorophyl b: 453 nm and 642 nm
‐Ratio: 3:1
‐Redshift with ß‐Carotine to 678 ‐ 680 nm
C6H12O6 + 6O2
Sugar
Oxygen
Chlorophyl a
Chlorophyl b
R1 = ‐CH=CH2
R1 = ‐CH=CH2
R2 = ‐CH3
R2 = ‐COH
R3 = ‐CH2‐CH3
R3 = ‐CH2‐CH3
R4= C20H39OH (Phytol)
ß‐Carotine
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2.Photosynthesis
Light reaction: Photolysis of a Hydrogen donor (energy take‐up)
2 H+ + 2 e‐ (higher plants)
H2O  ½ O2 + H2S  2 S + 2 H+ + 2 e‐ (green sulfur bacteria)
ATP
NADPH
Dark reaction:
Synthesis of carbon hydrates (energy storage)
CO2 + 2 H+ + 2 NADPH  (CH2O)x + H2O + 2 NADP+
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3.1 Incandescent Light
For lighting Indoor Houseplants
Old technology
High energy consumption
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3.2 MH Lamps
MH = Metal Halide
MH Lamps are gas discharge lamps
-only suitable for the starting and
growing phase
-no transmition of red light
-produce light in the blue spectrum
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3.3 HPS Lamp
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HPS = High Pressure Sodium
discharge takes place under pressure in an atmosphere of sodium mercury vapour
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3.3 HPS Lamps
Sodium vapor lamp
NDL Low pressure lamp (light color spectrum)
NDL high pressure lamp
Power:
1000 W
Brand:
Sunmaster
Color temperature:5500 K
Flux:
80000 lm
lm
Socket:
E40
Price: 100 €
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600 W
Sunmaster
6500 K
50000 lm
250 W
Philips
4500 K
20500 E40
55 €
E40
35 €
3.4 Fluorescent Plant Grow Lamps
Mercury discharge lamps
Working with phosphors
blue phosphor
Blue
440 to 460 nm
BaMgAl10O17:Eu
red phosphor
Red
590 to 630 nm
GdMgB5O10:Ce,Tb,Mn
YVO4:Eu (YVE)
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Y2O3:Eu (YOX)
3.5 Induction Plant/Grow Lamps
-Induction lamps are comparable to fluorescent tubes
-Thear lifetime could reach about 100000 burning hours
-working without electrodes
-fire the gas in the tube with magnetic field
-they need fluorescent material to produce light of
required light emission
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3.6 LED
-With LED-Technology plant growing is energy efficient
- life of LED is very high (about 50.000 h)
-Different kind of wavelength are possible (660 nm, 440 nm, 470 nm, 380 nm, 610
nm)
Golden Dragon Plus LED
Opening angle:
Voltage:
Current:
Output:
170°
3,2 V
350 mA/ 1.000 mA
4 W
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Oslon SSL LED
Opening angle:
Voltage:
Current:
Output:
80°
3,2 V
350 mA/ 1.000 mA
3,7W
4. Applications
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4. Applications
Growing of gras soccer field
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4.1 Ebay Examples
Power: 500 Lumen
Power: 600 Lumen
Power consumption : 14 Watt Power consumption : 15 Watt
Price: 26€
Price : 40€
Power:?
Power consumption: 9 Watt
Price : 17€
Power: 3650 Lumen
Power consumption : 90 Watt
Price : 95€
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Power: 4800 Lumen
Power consumption : 120 Watt
Price : 160€
4.2 Amazon Examples
Power consumption : 200 Watt
Price: 100€
HPS Lamp Growset
Power consumption : 400 Watt
Price: 80€
HPS Growlamp
Power consumption : 400Watt
Price : 70€
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Hydrofarm LY8U250CP
Power consumption : 250Watt
Price: 25€
Sources
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http://www.osram.de
http://www.eoearth.org
http://www.electronicproducts.com
http://zeiss‐campus.magnet.fsu.edu
http://www.eyehortilux.com
http://www.hidhut.com
http://www.nbsls.com/
http://progressivegardening.com
http://www.mountainvalleygrowers.com
http://www.sglconcept.com
http://www.econoluxindustries.com
http://www.sslight.de/blog/1652.html
•
Booklet Philips: Philips LED Lighting in horticulture •
Homepage: Prof. Dr. rer. nat. Thomas Jüstel
Inkohärente Lichtquellen (Incoherent Light Sources)