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  1. GrowLightResearch

    New light or????

    No doubt, you have been. :blsmoke:
  2. GrowLightResearch

    New light or????

    Nope, @Olive Drab Green has got you. HID is isotropic (i.e. omnidirectional). CoBs are not isotropic, they are directional. If a isotropic light source (e.g. HID) and a 120° directional light source (e.g. CoB) emit the exact same flux (total photons emitted) the directional will get more...
  3. GrowLightResearch

    New light or????

    How about wisdom? Knowledge is knowing tomato is a fruit. Wisdom is knowing not to put tomatoes in a fruit salad.
  4. GrowLightResearch

    New light or????

    I still love the ingenuity that went into your water cooled CoBs where the water is in contact with the CoB's thermal pad. Then using a heat exchanger to recover and reuse the heat, genius.
  5. GrowLightResearch

    New light or????

    @Olive Drab Green Another good analogy. Those Dr Seuss pages pretty much sums up the complexity of photons.
  6. GrowLightResearch

    New light or????

    If a light source is a few inches over a puddle with a square area of 1 m². and 2000 µmols of photons hit the puddle each second. That would be about the same number of photons from the sun hitting the puddle. Now raise the light source to a few feet over the puddle. Much less photons will...
  7. GrowLightResearch

    New light or????

    I like this analogy. I would go with the intensity being the number of rain drops of the same size hitting a puddle. In a high intensity rain more rain drops would be hitting the puddle per second than in a lighter (less intensity) rain storm. Mist was a great analogy for diffused light...
  8. GrowLightResearch

    New light or????

    Actually I'm on your side. I wanted to know what @nxsov180db thought PPFD meant. All he has been doing is implying you are wrong without saying offering anything of substance himself. I know how that feels.
  9. GrowLightResearch

    New light or????

    I thought it was legitimate for @Olive Drab Green to want a PPFD measurement. Now I wonder. What does he not know about PPFD? Why was a PPFD measurement not relevant?
  10. GrowLightResearch

    Bridgelux Gen2 BXEB-L0560Z-30E2000-C-B3 First Look

    On 1/17/2018 I paid $54.90 for seven. Yesterday seven cost me $83.89. All came from Arrow. If the price was $11.98 a month ago I would have gotten the Samsung F-Series. At $7.36 the BX Gen2 was very competitive with the F-Series. Supply and demand at work. I'm going to do two side...
  11. GrowLightResearch

    New light or????

    You have a good point. It is currently a hypothesis on paper. I am preparing for a new grow with 14 BXEB-L0560Z-30E2000-C-B3. I am going to try vertical side lighting 2 plants from two sides. Seven 22" strips on each side. Each set of seven strips powered by an HLG-240H-C1400B The seedlings...
  12. GrowLightResearch

    Bridgelux Gen2 BXEB-L0560Z-30E2000-C-B3 First Look

    I just paid $12 for seven BXEB-L0560Z-30E2000-C-B3 at Arrow. $5 more per strip than one month ago. Other distributors will not have any for a month or two.
  13. GrowLightResearch

    The Physical Dangers of LED Lights

    I love BigPharma. Except when they discontinued Quaaludes. BigPharma helps get me through the day. MH causes cancer? That's probably only in California. So what's the problem? You have an imaginary antidote to your imaginary cancer. Chemically induced psychosis? Put the pipe down.
  14. GrowLightResearch

    New light or????

    Less intensity at the center of the grow area. Due to more evenly distributed light.. More strips = more intensity. Height of the fixture determines penetration. Lower height of fixture = lower penetration. Yes, that is correct. Higher fixture = higher penetration with respect to the intensity...
  15. GrowLightResearch

    New light or????

    Yes strips are better than Cob. Better lumen/photon per price. Better lumen/photon per wall watt. No heatsinks required with EB Gen2. Better uniformity.
  16. GrowLightResearch

    Some set-up help please?

    Are you looking for off the shelf grow lights or DIY? If DIY is possible then have you considered strips? Like Samsung F-Series or Bridgelux EB Gen2? If not DIY, then QB is the better choice IMHO.
  17. GrowLightResearch

    The Physical Dangers of LED Lights

    Correction: Good sunglasses and tin foil hats are minimums. Condolences to those that actually viewed the video, you will never get that time back.
  18. GrowLightResearch

    Bridgelux Gen2 BXEB-L0560Z-30E2000-C-B3 First Look

    I was not sure at the time, thanks. Glad you chimed in, I though if anyone, you would know. I thought the "SPD" is luminous, but I know better than to doubt you. I guess if it were luminous it would be very lopsided. Too symmetrical. The V(wavelength) means spectral luminous efficiency...
  19. GrowLightResearch

    Bridgelux Gen2 BXEB-L0560Z-30E2000-C-B3 First Look

    I was thinking the epoxy had an organic dye rather than phosphor. The temperature curve was more like an AlGaInP than a nitride. Usually the forward voltage is the give away. Not this one. Just more confusing Then I looked at the Duris Amber because they typically have a horrible temperature...
  20. GrowLightResearch

    Bridgelux Gen2 BXEB-L0560Z-30E2000-C-B3 First Look

    Thanks. If you look on page 4 the minimum CRI column is 80 I see the CRI 90 at the bottom. Which is it? On the LM561B Plus on page 4 the minimum CRI column is 90. SPDs are identical. The B+ and C are almost identical. The C added more bin choices some with improved efficiency. Thanks...
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