measuring par: 400-700nm or 380-780nm?

pirg420

Well-Known Member

• Nov 22, 2018

• #1

Pretty simple question, what standard should horticulture lights be measured by when measuring total par and par/watt in a sphere?

400-700nm or 380-780nm?

Im doing some third party sphere testing and would like some input.

Thanks

 

Rocket Soul

Well-Known Member

• Nov 22, 2018

• #2

pirg420 said:

Pretty simple question, what standard should horticulture lights be measured by when measuring total par and par/watt in a sphere?

400-700nm or 380-780nm?

Im doing some third party sphere testing and would like some input.

Thanks

Click to expand...

Generally its 400-700nm. They should give you both though, easy enough if they have the gear. Also get your spectrum aswell, unless its a known white spectrum like 3000k

 

cidlym

New Member

• Nov 24, 2018

• #3

PAR is the range from 400-700nm for Photosynthesis. It is better to check the spectrum distribution. Some portalbe deveice could test the PAR too.


PAR/WATT must be test in a sphere, it is special and different with usual sphere.

Hope this is helpful.

 

wietefras

Well-Known Member

• Nov 24, 2018

• #4

If you want to be able to compare to actual PPF (PAR) values then use the actual PAR range of 400-700. If it's only for your own interest then you can use either (although one wont be PAR).

 

hybridway2

Amare Shill

• Nov 25, 2018

• #5

280-800 for our plants.
Would be nice if they made par meters measuring in at least 380-740. Maybe they do? The MQ-500 Apogee I used did 400-700 I think.

 

Last edited: Nov 25, 2018