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

Which is the true par range?

  • 400-700nm

    Votes: 4 66.7%

  • 380-780nm

    Votes: 2 33.3%
  • Total voters
    6
pirg420

pirg420

Well-Known Member
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
 
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
 
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.
 
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).
 
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:
You must log in or register to reply here.
Back
Top