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PAR

Photosynthetically Active Radiation (PAR)

Photosynthetically Active Radiation (PAR) is defined by the kind of light photosynthetic organisms can use to convert into chemical energy used for plant growth. This spectral range has been designated as 400 to 700 nanometers. When talking about light and plants, we should be talking PAR.

Key Note: PAR itself is not a measurement.


Photosynthetically Active Radiation (PAR)

Photosynthetic Photon Flux Density (PPFD)

Photosynthetic Photon Flux Density (PPFD) is the field measurement of the number of photons (light) in the PAR range emitted each second over a one meter square area. This data can be used to determine suggested grow footprint and hanging height. (To Learn More: What Makes One Grow Light Better Than Another?)

Below are PAR Maps and Suggested Footprint for each of our light fixtures individually, it is important to note, suggested hanging heights may change based on overall light density in your space.

Apogee PAR Meter

Mega PAR Numbers

Inside a 4' x 4' Grow Tent

  • Flower Footprint: 5' x 5'
  • PPF: 1400
  • Wattage: 650W
  • PPF/Watt: 2.15
  • Unit Dimensions: 37" x 37"
Mega-12inch
Mega-18inch

5' x 5' No Tent

  • Flower Footprint: 5' x 5'
  • PPF: 1400
  • Wattage: 650W
  • PPF/Watt: 2.15
  • Unit Dimensions: 37" x 37"
Mega-12inch
Mega-18inch


Veg8 Switch PAR Numbers (HI 190W)

Inside a 2' x 4' Grow Tent

  • Flower Footprint: 2' x 4'
  • PPF: 380
  • Wattage: 190W
  • PPF/Watt: 2.00
  • Unit Dimensions: 22" x 46"
Veg8-12inch
Veg8-18inch


Core PAR Numbers

Inside a 2' x 2.5' Grow Tent

  • Flower Footprint: 3' x 3'
  • PPF: 380
  • Wattage: 190W
  • PPF/Watt: 2.00
  • Unit Dimensions: 20.9" x 22"
Core-8inch
Core-12inch

*All Readings Taken Using LI-COR LI-250A Light Meter.


Sample Light Plots

NextLight provides Commercial Light Plots to all of our Commercial Clients at no cost. We use your unique project specifications, (i.e. room size, growing style, light intensity needs, etc.) to mimic real world light intensity maps of your grow space. This can help determine light fixture model, quantities and hanging heights needed to accomplish your goals.

Please fill out our Commercial Grow Form to the best of your ability and a qualified NextLight Representative will be in touch.



Product Specs

Product Type: MegaTotal BTU: 99,000
Number of Fixtures: 45Total Amp @ 120V: 243A
Total Watts: 29,250Total Amp @ 240V: 121.5A

Light Intensity Map: 3ft. from Canopy

20x40 Flower Map

Room Design

20x40 Flower Room Design
Distance from Canopy Average Min Max Uniformity (Min/Avg)
2 Feet 870 638 1160 73%
3 Feet 840 684 945 81%
4 Feet 814 631 884 78%
5 Feet 789 595 859 75%
  • 20x40 Flower Room Design 1
  • 20x40 Flower Room Design 2
  • 20x40 Flower Room Design 3
  • 20x40 Flower Room Design 4

Product Specs

Product Type: MegaTotal BTU: 316,800
Number of Fixtures: 144Total Amp @ 120V: 777.6A
Total Watts: 93,600Total Amp @ 240V: 388.8A

Light Intensity Map: 3ft. from Canopy

50x50 Flower Map

Room Design

50x50 Flower Room Design
Distance from Canopy Average Min Max Uniformity (Min/Avg)
2 Feet 881 651 1166 74%
3 Feet 864 685 956 79%
4 Feet 849 633 900 75%
5 Feet 835 598 884 72%
  • 50x50 Flower Room Design 1
  • 50x50 Flower Room Design 2
  • 50x50 Flower Room Design 3

Product Specs

Product Type: MegaTotal BTU: 33,000
Number of Fixtures: 15Total Amp @ 120V: 81A
Total Watts: 9,750Total Amp @ 240V: 40.5A

Light Intensity Map: 5ft. from Canopy

20x40 Veg Map

Room Design

20x40 Veg Room Design
Distance from Canopy Average Min Max Uniformity (Min/Avg)
4 Feet 293 193 419 66%
5 Feet 282 201 350 71%
6 Feet 272 199 316 73%
7 Feet 263 193 298 73%
  • 20x40 Veg Room Design 1
  • 20x40 Veg Room Design 2
  • 20x40 Veg Room Design 3
  • 20x40 Veg Room Design 4

Product Specs

Product Type: MegaTotal BTU: 79,200
Number of Fixtures: 36Total Amp @ 120V: 194.4A
Total Watts: 23,400Total Amp @ 240V: 97.2A

Light Intensity Map: 5ft. from Canopy

50x50 Veg Map

Room Design

50x50 Veg Room Design
Distance from Canopy Average Min Max Uniformity (Min/Avg)
4 Feet 227 132 381 58%
5 Feet 223 145 300 65%
6 Feet 218 149 262 68%
7 Feet 214 147 244 69%
  • 50x50 Veg Room Design 1
  • 50x50 Veg Room Design 2
  • 50x50 Veg Room Design 3
  • 50x50 Veg Room Design 4