Bud differences when using Cree Cxb3590 and samsung lm301h?

If you are providing maximum DLI relative to ambient environment, there will be minimal difference in yields. What can be different is your electricity bill. Provide same # of photons per second while using fewer watts. if you can get a more even blanket from a QB or an array of QBs, that'd be a plus. An array of cobs might be similar. if you ran them at lower wattage and used more of them, it may even be a more even blanket than a QB can get. Those actually have quite a hotspot in the center -- when speaking about 1 unit by itself. An array comes with its own dynamics. So in the end, the main difference is efficacy. I do now know the cree cob's umol/j. A good QB or bar-sty light using the smaller, midpower diodes spread out more will be around 2.8umol/J efficacy. Slip in osrams diodes and maybe 2.6-2.7. Cree xp-g3 photobost reds are the best to pair up with the samsung LM301B (B's tend to be cheaper than H's and it's is name only) efficacy - umol/J - proportionately 1:1 relation with your electric cost. if it's 20% more efficient it'll provide the same photons for less watts, or oyu can provide more photons at same watts, if you need more. Light has an upper limit. A DLI chart can help there.