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lol look what I just found: https://www.grower.ch/forum/threads/quantum-board-v3-mit-samsung-lm301h.120934/post-2708807 He mentions that the LERs and QERs from the spectra in the datasheet are exactly the same as the one from the LM301B datasheet. Even the same errors in the labeling

How is your german? :) It's an old school message board from 2002. I'm a lurker over there but I can take a look or ask him.

User Zynki from grower.ch also calculated the QERs and LERs for 3000K, 3500K and 4000K.

Hey guy, I just read about this new diode on grower.ch. It's called the LM302N and offers additional peaks at 450nm and 474nm. I don't know if these are usable or beneficial in growing. Maybe someone with deeper knowledge in spectra can comment on this. So long!

Yes. It seems like every second DIY build on German-speaking forums is based on their Zeus XT 308 They can be run without heatsink at ~120W

@Randomblame Since you already think about buying from LED-Tech.de you could also take the " 50cm Osram SSL Horticulture Hyper Red Plug & Grow Stripe" and combine them with the corresponding number of white diodes.

Well thanks a lot for the explanations and the support :) The LH351H looks like the pendant to the Osram Oslon SSL120 and the Cree XPE. All about 2.1-2.5V with max current of ~1000mAh. I have to dig deeper in the "math behind" thread, I don't know how to integrate and combine the spectra...

The LH351H deep red is a high power diode, up to 1000mAh I'm not allowed to post links yet but you can find the data sheets of the whole series at Samsung com / led / lighting /applications / / horticulture-lighting

Thank you very much, I couldnt wrap my head around this and I thought it was odd to run the 351H at "only" 150mAh.

Any ideas how the internal wiring of the Samsung L2 strip is and how the amperage and voltage of the single diodes is? I assume the 1ft strip is made with 48 x LM301H (5000K (?)) and 8 x LH351H 660nm and runs at 1200mAh and ~21,5V.

The wiring seems weird for LM301B. 18S x 18P? Isn't the LM301B rated max 3V & 0.2Ah?