Vandenberg
Well-known member
PPFD is how hard its raining at that moment while D.L.I. is how much it rained in a 24 hour period
The PPFD number multiplied by the 3600 seconds in an hour of time multiplied by how many hours the light was on will give you your daily light integral number, just lose all the zeros at the end of the calculation. .
What does Daily Light Integral (DLI) mean?
Daily Light Integral (DLI) is the amount of photons (light particles) received by a particular area in one day.
DLI greatly affects plant growth and development, and the measurement of DLI is important to many gardeners and growers. DLI can be measured, and its measurement is particularly important to commercial farmers and gardeners that use greenhouses.
Light particles, particularly those that have a wavelength between 400 and 700 nm, provide plants with the energy for photosynthesis.
DLI influences plant growth, vitality, and yield.
A rise or fall in the DLI that plants receive can affect a plant's root system, stems, and flowering stage.
Although many plants benefit from controlled DLI, specific levels needed will vary from plant to plant.
Knowing an area’s particular DLI can help gardeners in several different ways.
First, measuring an area’s DLI can help a grower decide which crop variety would grow and thrive best a particular location.
Additionally, DLI can help growers optimize use of supplemental lighting.
To measure DLI, growers will need to purchase a light sensor and record light levels throughout the day.
Light sensors and DLI meters can be purchased from specialty suppliers and do tend to get pricey fast.
In the past, biologists have used lux or energy meters to quantify light intensity.
They switched to using PPFD when it was realized that the flux of PPFD is the unit of measure, defined by ?mol/m2/s or micro-moles of photons falling on a square meter per second.
Normally, Photosynthetically available Radiation (PAR) wavelength is 400nm - 700nm.
The 400-700 m range is the important factor in driving the photosynthetic process.
Daily light integral includes both the diurnal variation and day length, and can also be reported as a mean value per month...
DLI has been shown to be better related to plant growth and morphology than PPFD at any moment or day length alone.
Some energy meters are able to capture PPFD during an interval period such as 24-hours.
PPFD is the unit of measure, defined by ?mol/m2/s or micro-moles of photons falling on a square meter per second.
Vandenberg
The PPFD number multiplied by the 3600 seconds in an hour of time multiplied by how many hours the light was on will give you your daily light integral number, just lose all the zeros at the end of the calculation. .
What does Daily Light Integral (DLI) mean?
Daily Light Integral (DLI) is the amount of photons (light particles) received by a particular area in one day.
DLI greatly affects plant growth and development, and the measurement of DLI is important to many gardeners and growers. DLI can be measured, and its measurement is particularly important to commercial farmers and gardeners that use greenhouses.
Light particles, particularly those that have a wavelength between 400 and 700 nm, provide plants with the energy for photosynthesis.
DLI influences plant growth, vitality, and yield.
A rise or fall in the DLI that plants receive can affect a plant's root system, stems, and flowering stage.
Although many plants benefit from controlled DLI, specific levels needed will vary from plant to plant.
Knowing an area’s particular DLI can help gardeners in several different ways.
First, measuring an area’s DLI can help a grower decide which crop variety would grow and thrive best a particular location.
Additionally, DLI can help growers optimize use of supplemental lighting.
To measure DLI, growers will need to purchase a light sensor and record light levels throughout the day.
Light sensors and DLI meters can be purchased from specialty suppliers and do tend to get pricey fast.
In the past, biologists have used lux or energy meters to quantify light intensity.
They switched to using PPFD when it was realized that the flux of PPFD is the unit of measure, defined by ?mol/m2/s or micro-moles of photons falling on a square meter per second.
Normally, Photosynthetically available Radiation (PAR) wavelength is 400nm - 700nm.
The 400-700 m range is the important factor in driving the photosynthetic process.
Daily light integral includes both the diurnal variation and day length, and can also be reported as a mean value per month...
DLI has been shown to be better related to plant growth and morphology than PPFD at any moment or day length alone.
Some energy meters are able to capture PPFD during an interval period such as 24-hours.
PPFD is the unit of measure, defined by ?mol/m2/s or micro-moles of photons falling on a square meter per second.
Vandenberg
Last edited: