THE COST OF ARTIFICIAL LIGHT FOR PLANT IRRADIATION
Information was therefore collected regarding different installation types, with the source of light and purpose of application differentiated:
- incandescent lamp installations for daylength effects: fixed and mobile installations, continuous and cyclic lighting;
- fluorescent and high-pressure mercury vapour lamp installations to increase assimilation;
- fluorescent and high-pressure mercury vapour lamp installations for forcing bulbs without daylight.
Total costs were calculated for a range of values of the most important cost components. For every installation type 8–10 different light intensities were taken into consideration, 4 different depreciation rates and 11 different kilowatt-hour cost values.
The material is arranged in such a way that total cost can be easily derived for every situation.
General conclusions may be also drawn from the material.