A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Growth light provision for indoor greenery: A case study
HighlightsIndustry practice of using lux levels for plant lighting assessment is erroneous.Lighting over-compensation of more than 30% reported in case study.Daily Light Integral should be used for plant lighting design instead of lux level.Onsite daylight survey must be conducted for accurate lighting assessment.
AbstractAdequate light provision for plants is essential when designing for indoor greenery, but there is a lack of knowledge with regards to lighting levels required for ornamental plants in the indoor environment. In practice, guidelines such as a lighting threshold of 1000lx for indoor vegetated surfaces may result in over or under-compensation of lighting for plants. The objective of this study is to quantify the impact of growth light provision on indoor greenery. Field measurement was conducted in a building with extensive indoor greenery. A growth chamber study was also conducted to measure the whole-plant light compensation point (LCP) of two species of plants (Philodendron erubescens and Dracaena surculosa) used in the indoor greenery design. Results showed that LCP for both P. erubescens and D. surculosa was between 0.50molm−2day−1 to 1.00molm−2day−1. Onsite measurements of Photosynthetically Active Radiation (PAR) from 09:00h to 18:00h showed an excess of PAR arising from the combination of daylight and supplementary lighting, resulting in lighting over-compensation of approximately 0.56molm−2day−1. However, this was not factored into the supplementary lighting plan, which specified a minimum lighting level of 1000lx. Since electricity consumption is highly correlated with whole-plant LCP (R2=0.9989), significant savings in energy can be achieved by (1) determining actual lighting requirements for each plant and (2) measuring daylight availability onsite before installing greenery in the indoor environment.
Growth light provision for indoor greenery: A case study
HighlightsIndustry practice of using lux levels for plant lighting assessment is erroneous.Lighting over-compensation of more than 30% reported in case study.Daily Light Integral should be used for plant lighting design instead of lux level.Onsite daylight survey must be conducted for accurate lighting assessment.
AbstractAdequate light provision for plants is essential when designing for indoor greenery, but there is a lack of knowledge with regards to lighting levels required for ornamental plants in the indoor environment. In practice, guidelines such as a lighting threshold of 1000lx for indoor vegetated surfaces may result in over or under-compensation of lighting for plants. The objective of this study is to quantify the impact of growth light provision on indoor greenery. Field measurement was conducted in a building with extensive indoor greenery. A growth chamber study was also conducted to measure the whole-plant light compensation point (LCP) of two species of plants (Philodendron erubescens and Dracaena surculosa) used in the indoor greenery design. Results showed that LCP for both P. erubescens and D. surculosa was between 0.50molm−2day−1 to 1.00molm−2day−1. Onsite measurements of Photosynthetically Active Radiation (PAR) from 09:00h to 18:00h showed an excess of PAR arising from the combination of daylight and supplementary lighting, resulting in lighting over-compensation of approximately 0.56molm−2day−1. However, this was not factored into the supplementary lighting plan, which specified a minimum lighting level of 1000lx. Since electricity consumption is highly correlated with whole-plant LCP (R2=0.9989), significant savings in energy can be achieved by (1) determining actual lighting requirements for each plant and (2) measuring daylight availability onsite before installing greenery in the indoor environment.
Growth light provision for indoor greenery: A case study
Tan, Chun Liang (author) / Wong, Nyuk Hien (author) / Tan, Puay Yok (author) / Ismail, Mirza (author) / Wee, Ling Yan (author)
Energy and Buildings ; 144 ; 207-217
2017-03-18
11 pages
Article (Journal)
Electronic Resource
English
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