BOBBY_G
Well-Known Member
noted i will redo at some point with either all ideals or grease+kapton to avoid reflectance.1825 with BJB holder VS 3590 on Ideal holder is slightly biased in favor of 1825. This is because the BJB holder acts as a small reflector.
https://www.rollitup.org/t/lens-and-reflector-optics-for-cob.893660/page-7#post-12229578
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i use a li-cor which is pretty flat. ever so slightly weights the redsPlus cob spectrum vs Apogee response curve. Adjusting for that would move accuracy a little more in the right direction too.
https://www.rollitup.org/t/lets-talk-inexpensive-par-meters.911434/#post-12666128.
of course all of these discount everything over 700 which beats up on the 90 cri cob readings which are relatively strong from 700-750