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convert lux to μmol. photons m^-2 s ^-1

PostPosted: Mon May 09, 2005 10:05 pm
by tony
How could I convert 400 lux to μmol. photons m-2 s –1 ??


Thx

Re: convert lux to;mol. photons m^-2 s ^-1

PostPosted: Wed Jun 08, 2005 2:46 pm
by Guest
tony wrote:How could I convert 400 lux to ìmol. photons m-2 s –1 ??


Thx
Well, if You would like to calculate exactly You have to take into consederation the light source, because photons are related to the spectrum available for the cloroplasts of the plants. If the wavelenght of Your light source is between 400 and 700nm, You can calculate roughly in the following way:

1 µMol (photons)s-1m-2 = 56 +/- 3 lux

the unit µE m-2s-1 is used also as an equivalent to µMol