Model PS-100
$3,995.00
Model PS-200
$4,495.00
Model PS-300
$5,495.00
- View Specs/Manuals
- Order PS-100
Model PS-100
$3995.00
- Order PS-200
Model PS-200
$4495.00
- Order PS-300
Model PS-300
$5495.00
We currently have a 1 – 2 week lead time on all orders, but please feel free to call ahead for product availability.
Our spectroradiometers measure radiation with 1/2 nanometer bandwidth resolution.
Phytochrome Photoequilbria and YPF Weighting Factors
Click this link for the excel spreadsheet sheet on Phytochrome Photoequilbria and YPF Weighting Factors.
These weighting factors are necessary to convert measurement of the photosynthetic photon flux from a spectroradiometer, to units of Yield Photon Flux (YPF). Measurement of YPF may provide a more accurate indication of the potential for photosynthesis from a light source.
These weighting factors also include factors for calculating the Phytochrome Photoequilibria (PPE) from spectroradiometer measurements. These measurements are made automatically in software with the Apogee spectroradiometer.
For more information see:
Bugbee, B. 1994. Effects of Radiation Quality, Intensity, and Duration on Photosynthesis and Growth. p. 39-50. In: International Lighting in Controlled Environments Workshop. T. Tibbitts ed. NASA Tech Proceeding No. NASA-CP-95-3309. Kennedy Space Center, FL 32899.
Dougher, T. and B. Bugbee. 2001. Differences in the response of Wheat, Soybean, and Lettuce to reduced blue radiation. Photochemistry and Photobiology. 73:199-207.
Dougher, T. and B. Bugbee. 2001. Evidence for yellow light suppression of lettuce growth. Photochemistry and Photobiology. 73:208-212.
Dougher, T. and B. Bugbee. 1998. Is Blue Light Good or Bad for Plants? Life Support and Biosphere Science. 5:129-136.
Barnes, C., T. Tibbitts, J. Sager, G. Deitzer, D. Bubenheim, G. Koerner, and B. Bugbee. 1993. Accuracy of Quantum Sensors Measuring Yield Photon Flux and Photosynthetic Photons Flux. HortScience 28:1197-1200.
Barnes, C. and B. Bugbee. 1992. Morphological Responses of Wheat to Blue Light. Jour. of Plant Physiol. 139:339-342.
Barnes, C. and B. Bugbee. 1991. Morphological Responses of Wheat to Changes in Phytochrome Photoequilibrium. Plant Physiol. 97:359-365.
