A little blurb on Seneye's PAR and what drives their PUR measurements. I wanted to make sure I was reading the PUR reading right which is a percentage of that PAR reading.
http://answers.seneye.com/index.php?title=en/Aquarium_help/What_is_PAR_&_PUR_?
"As a seneye measures both spectrum and PAR it can give a good idea of the % of PUR in a PAR value."
On Seneye making their PAR sensor specialized for reef lighting particularly the blue spectrum. Possibly why it's better at the LED readings then the older Apogee model was.
" most PAR devices are aimed for use in greenhouses where they are more interested in the red end of the PAR spectrum as this is where most terrestrial plant get there useful light from. The seneye device is more sensitive than most at light below 450nm (bluer). This is arguably the most important spectra for coral and why most marine aquarists use additional actinic (03) spectrum bulbs."
http://answers.seneye.com/index.php?title=en/Aquarium_help/What_is_PAR_&_PUR_?
"As a seneye measures both spectrum and PAR it can give a good idea of the % of PUR in a PAR value."
On Seneye making their PAR sensor specialized for reef lighting particularly the blue spectrum. Possibly why it's better at the LED readings then the older Apogee model was.
" most PAR devices are aimed for use in greenhouses where they are more interested in the red end of the PAR spectrum as this is where most terrestrial plant get there useful light from. The seneye device is more sensitive than most at light below 450nm (bluer). This is arguably the most important spectra for coral and why most marine aquarists use additional actinic (03) spectrum bulbs."