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Milad LEDGroupBuy.com

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About Milad LEDGroupBuy.com

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    LED Police

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    St Louis
  1. Milad LEDGroupBuy.com

    (TV UV HV) Violet showdown - LEDGroupBuy vs SemiLED

    Here is more detailed explanation from one of our engineers on the sensor: To answer one of the questions on the thread there: The sensor is a thermopile and measures total energy flux. It basically sees all wavelengths of light mashed together as a blob of "heat" or energy rather than seeing the specific wavelength like semiconductor based photodiodes do. The sensor material isn't as sensitive to wavelength variations as, say, a photodiode is but there is still a bit of variance with wavelength due to the optical properties of the thermopile sensor element (there is no such thing as a perfect absorber). So they create calibration curves for the sensor to take this into account. Since LEDs emit light in a fairly tight spectrum, you can set the meter to the peaking wavelength to correct for the slight variations in the sensor performance with wavelength. If you are using white light or an unknown source of light it doesn't matter a whole lot. The calibration makes more of a difference when you are using narrow bands of light like in lasers and, to some degree, LEDs.
  2. Milad LEDGroupBuy.com

    (TV UV HV) Violet showdown - LEDGroupBuy vs SemiLED

    Well it doesnt output like a spectrometer, its designed to measure power. Would you guys rather see the results under a spectrometer instead of the power meter?
  3. Milad LEDGroupBuy.com

    New 4' biuld

    tough call how about its own manual timer? you probably have one laying around.
  4. Milad LEDGroupBuy.com

    (TV UV HV) Violet showdown - LEDGroupBuy vs SemiLED

    My understanding of it is depending on the wavelength you set it at, it gives you the most precise measurement of power on that wavelength If i set it to 400nm and measure an LED that is 410 or 420 or 430 or 660, it will give me a measurement but it won't be as accurate as if I set it to the different wavelength as I changed the LEDs. So changing the wavelength from each test is going to give me the most accurate reading.
  5. Milad LEDGroupBuy.com

    (TV UV HV) Violet showdown - LEDGroupBuy vs SemiLED

    its the standard PM10 part #1097901 What do you mean by the photosensitivity of the wavelength? The FieldMaxII-TO lets me set the wavelength to measure so I've switched it every time i took a measurement to match the LED peak. Sorry I havent posted the video, im still waiting to get some time to complete the jig so its as close as possible to the same test between LEDs. Hopefully this week.
  6. Milad LEDGroupBuy.com

    New 4' biuld

    On my personal build I actually did exactly what you are saying. I put the drivers ontop of the heatsink and only 1 power cord to all the drivers. A month into it, I took a afternoon and redid the drivers and had them mounted below the tank. This just made it easier to route wires in the heatsink. I also gave each driver its own outlet on my Apex controller so I can turn them off/on whenever i wanted to. This gives easy ability to show the tank once the lights have gone off via my phone. The drivers dont produce enough heat to warrant precautions. They get warm but not toasty.
  7. Milad LEDGroupBuy.com

    Upgrading to 20L Tank

    The OCW should really be turned down to 500mA but you can run them up to 700mA as long as they are cooled well.
  8. Milad LEDGroupBuy.com

    Sump/Fuge LED suggestions for macro growing

    If you want insane growth on your ATS or macro then check this out: http://www.nano-reef.com/topic/311526-algae-turf-scrubber-ats-led-cannon-build-makersled-pics/ nothing compares to it that I have seen.
  9. Milad LEDGroupBuy.com

    Full-spectrum LED controller owners, what is your sunrise/ sunset regime?

    My personal tank i settled with: start violets hour later OCW hour later RB hour later NW then the reverse. Once the OCW and TV are just on its not "natural" but the looks is different so visitors enjoy the uniqueness for a hour
  10. Milad LEDGroupBuy.com

    DIM4 and Deep Red LEDs

    We have tried to come up with a solution but we have fallen short each time. I've been asked about it several times actually. Ya our integration with the shipping carriers is so tight now that they move our shipments incredibly fast. Often times for USPS we update with the tracking information before their website does!
  11. Milad LEDGroupBuy.com

    Optic angle OCW

    np, we appreciate any feedback: http://www.nano-reef.com/topic/289632-ledgroupbuycom-feedback/
  12. Milad LEDGroupBuy.com

    need help selecting drivers for 72 cree xte build

    You can use 3 75w 700mA drivers and put 24 LEDs on each. Nice and simple and all your drivers are the same.
  13. Milad LEDGroupBuy.com

    True Violet Lens Reliability

    yup sorry, still working on it.
  14. Milad LEDGroupBuy.com

    DIM4 and Deep Red LEDs

    Well your DIM4 is going to heat up alot. I would make sure you have nice fan on the DIM4.
  15. Milad LEDGroupBuy.com

    PWM for Inventronics

    Inventronics drivers are all PWM. Their dimming circuit are 0-10v dimmable NOT PWM. The difference in efficiency you will not notice. Meanwells, Inventronics, ABCD drivers all go down to a min percentage (around 10%). So for a 450mA driver thats 45mA which isnt too bad but for a 2100mA driver thats 210mA which is really bright.