larry, CXB3590 (top shelf) is 5000K because it was cheaper. The bottom is 3000K-5000K.
If you want really high power red or red+blue, check Flipchip Opto Duet:
Flip Chip Opto |. Their PAR efficiency is lower than white COBs, though. From my brief communication with them, they don't seem to be targeting right, and they probably should have better understanding of plant photobiology.
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Happy Thanksgiving!
Another DIY LED update. I made a plastic container based grow space. I used Samsung H series LED linear modules this time. This module was announced in Summer 2016, but it started to ship in October. This Samsung basically beats Philips XF-3535L (I posted about this previously) in all aspects. It has amazing efficacy (187lm/W), even higher than most COB LEDs. I haven't calculated the PAR efficiency, but I'm pretty sure there is no commercially available grow light with this high efficiency. It is a bit more expensive per light output than COB, but it is easier to assemble, and better for a small area. Also, it provides very even light distribution. It costs about $60 to cover 2-3 sq. ft.
I built this for pygmy Drosera, so it is targeting high-light plants. But if you increase the distance or spacing, it will work with orchids, too. I listed an alternative configuration with lower output. It takes about 1 hour to assemble.
Here is the
link to my Orchid Borealis blog post.
Drosera dichrosepala ssp. enodes from Scott River. Catalogue #10a of
Drosera Gemmae.
Threaded Mode
