In:
Ege Üniversitesi Ziraat Fakültesi Dergisi, The Journal of Ege University Faculty of Agriculture, Vol. 58, No. 3 ( 2021-09-05), p. 385-397
Abstract:
Objective: In this study, it is aimed to determine the PAR distribution of different types LED and the arrangements that could make the working efficiency in the LED light sources.
Material and Methods: Four locally produced LED developed for greenhouses have been considered. The PAR measurements were carried out within the specially designed a testing unit in a dark room in 10×10 cm square grid within 3×3 m dimensions. The height between the PAR sensor and the LED was considered as 31.6, 50, 75, 100, 125 and 150 cm. In the evaluations, different uniformity coefficients were calculated and PAR distribution patterns were determined for different mounting height and spacing. Results: The minimum and maximum daily light integral values for A, B, C and D LED were found 23.8-9.3, 13.8-3.6, 2.1-1.3, 2.2-1.1 mol·m−2day−1, respectively. In terms of daily light integral, it can be said that A and B LED can be used in both full artificial and supplementary lighting and, C and D LED can be used only in supplementary lighting for PAR applications.
Conclusion: It was determined that all LED had acceptable PAR uniformity according to the different distribution uniformity criteria for over 100 cm mounting height and spacing.
Type of Medium:
Online Resource
ISSN:
1018-8851
DOI:
10.20289/zfdergi.849364
Language:
Unknown
Publisher:
The Journal of Ege University Faculty of Agriculture
Publication Date:
2021
detail.hit.zdb_id:
2839857-9
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