McCree – photosynthetic active radiation

McCree – Action Spectrum Author links open overlay panelK. J. McCree Institute of Life Science and Biology Department, Texas A and M University, College Station, Texas U.S.A. Spectral quantum yields The aim of these measurements is to provide a factual basis for a standard definition o f “photosynthetically active radiation”. The need for a standard …

Lighting terminology Part 1 – PAR, PPF & PPFD

Plant VS Human lighting terminology Important lighting termininology, terms and units Light for Plants Light for Humans PAR Photosynthetic Active Radiation Radation between 400 and 700 nm (nanometer) of the solar spectrum can be used by phototropic organism, like plants to drive photosynthesis. This radation is called photosynthetic active Radiation or PAR. Visible Light Radation…

Daily Light Integral – DLI – [mol/m²d]

Daily Light Integral DLI: Daily Light Integral mol/m²d Daily light integral (DLI) describes the number of photosynthetically active photons (individual particles of light in the 400-700 nm range, PAR) that are delivered to a specific area over a 24-hour period. This variable is particularly useful to describe the light environment of plants. Source: Wikipedia – DLI More about…