jumpincactus
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Here is a published study on a cost analysis of LED vs HID tech. The study uses many name brand fixtures and covers LED, CMH, LEC, HPS, Flouros etc.
Most excellent read.
Jacob A. Nelson and Bruce Bugbee
Crop Physiology Laboratory, Department of Plant Soils and Climate, Utah State University, Logan, UT 84322-4820 USA
This paper is complemented by a five-year cost calculator for plant lighting: http://cpl.usu.edu/htm/publications/file=15575
Here is the link to the published work in PDF format. Download it for reading at your own pace.
Most excellent read.
Jacob A. Nelson and Bruce Bugbee
Crop Physiology Laboratory, Department of Plant Soils and Climate, Utah State University, Logan, UT 84322-4820 USA
This paper is complemented by a five-year cost calculator for plant lighting: http://cpl.usu.edu/htm/publications/file=15575
Here is the link to the published work in PDF format. Download it for reading at your own pace.