1. 1 LeuchTek GmbH Hamburg, Germany www.LeuchTek.de

2. 2 Benefits of supplemental lighting Higher yield, more vigorous leading to a lower risk of disease and aiding the process of biological control Full year-round production is possible Fruit tends to be more consistent in terms of quality and taste. Less disease and fungi problemsEnergy is used more effectively and overall use/kg of product will be lower. Increase CO2 and irrigation cycles Stronger and quicker root development

3. 3 More light, more growth The general lighting saturation level can be as high as 115000lux, which from a practical point of view, cannot be achieved. Thus normally always more light, more growth. But more lighting increases the cost Reasonable payback would appear to be possible for an installation producing 6,000 to 15,000 lux.

4. 4 Typical Applications Propagation. Seeding, Plant raising, Eggplant,(Aubergine), Cucumber, Sweet pepper,Tomato Bedding Plants. Ageratum, Antirrhinum,snapdragon, Begonia, Dianthus,carnation, Gazania, Impatiens, Pelargonium, geranium, Petunia Potted Plants. Kalanchoe,Chrysanthemum, orchids Cut Flowers. Alstromeria,Roses,Gerbera

5. 5 Influece of supplemental lighting Following slides show some research/practical results in terms of supplemental lighting in greenhouse. Most of them are extracted from academic papers.

6. 6 Tomato Tomatoes cultivated in the Netherlands, lit with 10,000 lux can produce 92 kg/m2 annually, and with 15,000 lux it is possible to produce 104 kg/m2. When production is unlit the harvest Is about 59kg/m2. -- Harry Stijger

7. 7 Rose With supplementary lighting the production was 24% higher than the control.. the development of axillary buds was promoted, the number of flowers with inferior quality was less. There was no influence of supplementary lighting on the total number of flowers. C. Vonk Noordegraaf, SUPPLEMENTARY LIGHTING AT THE ROSE CV 'SONIA' An increase in the lighting period (LP) enhanced the number of flowering shoots by 12% and fresh weight per shoot by 5%. MORTENSEN L. M. „Influence of air humidity and lighting period on growth, vase life and water relations of 14 rose cultivars“

8. 8 Scaevola Influence of CO2 + HPS lighting combo

9. 9 Additional practical Information 18 to 20 hour/day ( day length + supplemental ) lighting time can be very helpful For a rough calculation, each 10m 2 /600W can reach 6000lux. (Distance 2-3m) Each 1000lux lighting can increase the temperature of greenhouse 0.7degree 1 Micromol (umol)=7.62 FC(foot candle)=81.9lux

10. 10 Lamp and application Kelvin Color Temperature Incandescent lamp has low efficiency, high temperature, short bulb life time Fluorescent lamp has good efficiency, suitable for seeding, leaf lettuce, spinach HPS lamp has very high efficiency, used in less color critical applications such as parking lots, street lights and horticultural lighting. The orange/red spectrum helps to produce larger harvests of higher quality fruits or flowers. MH lamp has high efficiency, close nature sunlight thus suitable for stadium, malls. Crops has nature look but not high yield. Note: High Pressure Sodium (HPS) lamp and Metal Halide (MH) lamp all belong to High Intensity Discharge (HID) lamps. It needs a driver, i.e. ballast.

11. 11 Magnetic vs. Electronic ballast Type Magnetic Ballast Electronic Ballast Power400W 600W400W600W Operating Current (A)7.5 92.32.95 Total Power Consumed (VA) 1012 1364420623 PF0.43 0.470.99 Waste Power Saved 56%58% Bulb Lifetime 1 122 Energy-saving up 58% Prolong Bulb life time We focus on the electronic ballast only!

12. 12 LeuchTek GmbH & Products

13. 13 LeuchTek, your partner in greenhouse lighting LeuchTek is a dynamic player in agricultural supplemental lighting Especially LeuchTek offers HPS electronic ballast Located in Hamburg, service for European market

14. 14 Products for Greenhouse PLG602,402 series (600w, 400w)PLG601,401 series (600w, 400w) PLG603,403 series (600w, 400w) PLG1200,800 series (1200w, 800w) Available 230V 50Hz / 120V 60Hz PLG2-3 reflector PLG2-4 reflector

15. 15 Our Strength Convenient and robust connection box  The only product which is certified by TUV-GS, UL, FCC  RoHS compliance tested and passed  Second prize winner of Hortifair 2003  4 international patents  Best quality/price rate; state-of-art design

16. 16 If you need quotations or rough designs, please contact us LeuchTek GmbH Hans-Henny-Jahnn-Weg 17 22085 Hamburg, Germany Tel: +49 40 23495747 Email: info@LeuchTek.com