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  1. Stephenj37826

    Dollar Store Grow Lights!

    DIY10 for 10% off all products at hlg.com
  2. Stephenj37826

    4 if you are going to use most of the space.

    4 if you are going to use most of the space.
  3. Stephenj37826

    Help me choose a 4x4flowertent light

    P.S. our Samsung leds come from Vietnam and Osram is made in Malaysia.....We say made in the USA all the time.....
  4. Stephenj37826

    Help me choose a 4x4flowertent light

    Most people do not realize the Chinese government subsidizes tech companies 20%. So they sell sometimes 10% below cost of production. Furthermore I buy direct from Samsung and know full well you can not be getting something legit aas it costs use more than what you claimed to pay in parts alone...
  5. Stephenj37826

    Help me choose a 4x4flowertent light

    We produce boards in house or Samsung makes them for us in South Korea. See this post. We spent over 700k on an SMT line featuring a Panasonic NPMW2. I personally run it at times.
  6. Stephenj37826

    Help me choose a 4x4flowertent light

    You sure about that? Buddy why open your mouth without evidence to back up such claims? We produce our boards in house right here in the good old USA...... I have never bought one thing from Meiju..... Again you seem so sure of your "facts" .... You don't know anything whatsoever about my...
  7. Stephenj37826

    DIY with Quantum Boards

    In the next week or 2
  8. Stephenj37826

    @nizzayes it can be used on 120V.

    @nizzayes it can be used on 120V.
  9. Stephenj37826

    Examining Samsung's 3.03μmol/J Claim

    Nichia has some really good LEDs. Just pricey. We considered them several times and used a few million. Gotta love that S.Korea vs Japan unspoken tech war Haha.
  10. Stephenj37826

    Examining Samsung's 3.03μmol/J Claim

    Which coincides with what I said. If 80% is the pre phosphorus conversion then basically you are at 80% of the theoretical limit of blue pumped phosphorus. Quantum dot may be a different story eventually. Oh they are definitely 3.0+ at low drive current. Our new light will be damn close to...
  11. Stephenj37826

    Examining Samsung's 3.03μmol/J Claim

    Tweaked spectrum, higher efficiency, and overall output increase.
  12. Stephenj37826

    Examining Samsung's 3.03μmol/J Claim

    If I remember correctly the 80% numbers are a reference percentage of the theoretical efficiency of phosphorous converted white using a 450nm blue "pump". 65% is more in reference to LER or the lumens a respective spectrum would produce at 1 watt 100% efficiency.
  13. Stephenj37826

    Examining Samsung's 3.03μmol/J Claim

    I had this conversation with them back in the 561C days. I'll see what I can find out. The 3.03 umol/j is the only metric I really care much about of course. Sticking with similar spds I do rough estimates on them using lm/w metrics. If something stands out I get samples and off to the sphere...
  14. Stephenj37826

    Hlg 480h -54A

    Hlg 480h -54A
  15. Stephenj37826

    Its roughly 10"X 8"x 3"

    Its roughly 10"X 8"x 3"
  16. Stephenj37826

    Samsung lm301b or lm301h?

    There are post here in this section where guys bought knock off boards and recieved different LEDs on two separate boards. Both were not lm301b.
  17. Stephenj37826

    Samsung lm301b or lm301h?

    They have.... But it's also on the 301B.
  18. Stephenj37826

    DIY with Quantum Boards

    Actually it my be slightly higher than V2. 2 reds are in series so the string length is actually a little longer. I'll have amit update the website. Add 1.5 volts to V2 numbers to be safe.
  19. Stephenj37826

    DIY with Quantum Boards

    Not at 150 watts each. Need to look at the chart on the website.
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