Recent content by krap101

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  1. K

    Aquarium LED light

    What would I need to do to add the dimming function? I was reading that I need to add some board or something?
  2. K

    Aquarium LED light

    I'm getting ready to buy my meanwell, and I'm wondering which would be better for dimming, the vdc model or the pwm model? As these meanwells are built specifically for leds, I'm assuming that they flicker at a range above that which we can see (around 60hz in the periphery)
  3. K

    Aquarium LED light

    I ordered them the other day. I need two fans to get the 24V, so I might just use 2 80mm's or something. It's about the same price, and my tank is only like 12" deep, so I don't think high power will matter as much. thanks again
  4. K

    Aquarium LED light

    Price was one thing, and spotlighting is another. Generally it's better to use more leds at a lower power than more leds at higher. It looks like the xpg's will put out about 2x the lumens, but I'm sure it will be less at 800ma. I bought my XR-E's for around 3$ each, and for that price, it...
  5. K

    Aquarium LED light

    The reason I decided on the 15V 4A meanwell is because that left the least amount of volts unused (I think it was .2V), which means that I could run the meanwell slightly above it's "rated" voltage, or run the leds very slightly under their "rated" voltage. Maybe I'm still thinking in...
  6. K

    Aquarium LED light

    If I'm using a dimmable meanwell, wouldn't that mean that the voltage must be kept constant?
  7. K

    Aquarium LED light

    I posted on a fish forum, and one member told me that meanwells can not run parallel strings. I'm just checking before I go ahead and buy it, because nothing I read said anything able that. Also, I'll have an extra .8 amps unless I decide to add another string. The meanwell will control this...
  8. K

    Aquarium LED light

    Thanks for the quick reply I wanted something near 6700k, and I wasn't sure how it was going to look. this is going over a 10 gallon tank, and I'll just use the heatsink to keep everything together. I wasn't sure of how different colored leds would work in series or in parallel with...
  9. K

    Aquarium LED light

    Hi, I'm planning on making a light with 12 Cree XR-E Q2 WC leds, and I'm wondering if this will work out. I want to use a Meanwell 60W 15V 4A driver, and make 3 strings of 4 LED's. I want the leds to run around 3.7V and 800ma, or close to 3W.
  10. K

    Led panel using cree xre stars?

    I was looking for the resistors at radioshack and they didn't have them, so I found 2 watt 2 ohm resistors here...
  11. K

    Led panel using cree xre stars?

    Okay, I think I was getting confused with leds in parallel (rather than in a series) where you go from a low voltage to a high voltage, it would rather go back to the source rather than to the next led (something about resistance).. So, as for the resistor (I'm going to try all whites to begin...
  12. K

    Led panel using cree xre stars?

    Yeah, from what I've read, these new white leds work just like a fluorescent bulb. The led puts off uv light, it his a phosphor coating, and it puts off white light. The spec sheet says the range is like 5000k to 10000k, which is basically the spectrum of white tinged yellow to almost blueish...
  13. K

    Led panel using cree xre stars?

    I was looking through radioshack and can't seem to find the right resistor. Will I have to buy this online? Also, is 2 strings of 5 cree xree q5's overkill? I'm planning on growing some plants.
  14. K

    Led panel using cree xre stars?

    I'm actually thinking it might be easier to use a driver like this one http://www.instructables.com/id/Super-simple-high-power-LED-driver/?comments=all#CKM8SB4FQ6DWWLF Okay, So I found a 24w 1.875A macbook charger to add to the pile, but now I'm starting to consider using a 12v charger (tons...
  15. K

    Led panel using cree xre stars?

    So... I'm planning on making a panel for my 10 gallon (possibly eventually my 29 gallon) and I'm a little confused on a few things. I've been reading around, and it seems that I need a power supply of some sort, a driver, the leds, and a heatsink. So far, I found 2 laptop chargers that I'm...
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