Daily Light Integral Map

Light unit conversion table.

Daily light integral map.

Daily light integral dli maps display the ambient light delivered daily during each month across the entire u s. Bright ideas in the works. Mol m 2 d 1. Light layout request benching forms.

The daily light integral dli is the number of photosynthetically active photons photons in the par range accumulated in a square meter over the course of a day. Daily light integral dli dli ppfd over the course of a light cycle measured as moles of par photons per day example. Dli has become a familiar measurement for plant scientists and commercial growers. Dli stands for daily light integral.

A light emitting ppfd 1000 running 12 hours emits a dli 43 2 moles day computed as 60 sec min 60 min hr 12 hrs day ppfd 1 million current research indicates cannabis grows best at ppfd 1500 dli 65 and temperature 30 degrees c lighting. Dli maps display the ambient light delivered daily during each month across the entire united states. Mapping monthly distribution of daily light integrals across the contiguous united states pamela c. Maps of monthly outdoor dli throughout the united states.

It is a function of photosynthetic light intensity and duration day length and is usually expressed as moles of light mol photons per square meter m 2 per day d 1 or. Daily light integral dli represents the total photosynthetically active radiation accumulated over one day. Glossary of grow light terms. December 23 2016 these maps provide the average outdoor daily light integral throughout the continental united states and were developed by jim faust at clemson univ.

These maps were researched and developed by james faust of clemson university and joanne logan of the university of tennessee. Korczynski joanne logan and james e. The original maps released in 2002 were researched and developed by jim faust at clemson. Daily light integral dli maps download file.

It is the measurement of the total amount of light that falls in a certain location. Knowing the dli is important in determining if there is sufficient natural light for your crops or if supplemental light is required for your greenhouse operation. To estimate the average dli in your greenhouse determine the percentage of light transmission that reaches your crops. They are unique because dli is a measurement of light that is particularly valuable for estimating plant.

Since plants are essentially accumulators of solar radiation this measurement is extremely useful for describing solar radiation as it affects plant growth.