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Hoppy Hoppy is online now

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Showing Visitor Messages 121 to 130 of 203
  1. phantom85
    06-03-2012 12:37 AM - permalink
    hey hoppy. love your work, the led guru. i would like to upgrade my led fixture. i have done a DIY one before and thanks for your help on that one. at the moment i am i am running 12 cree XML-t6 at 700ma. what i was thinking of is buying 2 of these and running 9 of the cree xml-t6's of each of these and building the heatsink myself. this is going over a 4 foot med planted 60g tank, dosing dry ferts and co2 injected.

    what i wanted to ask your help on is
    1. is there a better driver out there that i just cant seem to find that will save me from having to wire up 2 sets of 9 at 1750ma
    2. is this going to be overkill on the lights?
    3. what would be the best way to arrange them. i was thinking two 4inch wide heatsinks running the length of the tank. if the tank is 18inchs wide then one running say 6inchs from the front and the other 12 inchs from the front.

    thanks man for any help you can offer
  2. Hoppy
    05-21-2012 10:49 PM - permalink
    I have never grown HC, and my experience with glosso was limited to trying out the dry start method. So, I can't comment on use of T5NOs for growing HC/glosso. I also have never used NO lighting, so I can't comment based on my experience with them for growing any plants.
  3. ThatGuyWithTheFish
    05-21-2012 09:51 PM - permalink
    In your experience, can T5NOs grow HC/glosso carpets or ludwigia?
  4. ThatGuyWithTheFish
    05-14-2012 06:28 PM - permalink
    Hm, here's a link to his site:

    You probably don't know him, or you would've recognized his name instantly. :P
  5. Hoppy
    05-14-2012 06:05 PM - permalink
    Uncle Ned? No, I had a lot of uncles, but no Neds.
  6. ThatGuyWithTheFish
    05-13-2012 08:56 PM - permalink
    Hey, do you know Ned of Uncle Ned's in MA? Your avatar really reminds me of the one from his website homepage.
  7. Hoppy
    05-09-2012 04:52 AM - permalink
    treelimbjim, that other post was done back when I was still trying to make sense out of designing a LED light. I wouldn't recommend following that method now. The calculator is based on more data and more varied data. If you have taken some PAR measurements with other configurations I would appreciate receiving the data so I can see how it fits in with the other data I have.

    This is still an evolving design process, but I haven't seen a better process.
  8. treelimbjim
    05-09-2012 03:23 AM - permalink
    Thank you for your contributions.

    Trying to answer "How many (and type) LEDs to use my 70 gal?" or simply, "Is 24 XPG enough? 36?"

    I've been estimating with spreadsheet V.3.

    Tank: 48wx18dx20h, 3" substrate

    Frame: 1.5" aluminum extrusions, 3 x 48" rails on 5.25" centers.

    Table for PAR est. for L,M,H light (see below)
    LED height: Tank_height + LED_Height_above_water - Substrate_depth
    Conditional format: 1) PAR background is blue, green, orange for L,M,H light. 2) current background is red when >rating.
    Table for Spread with LED_Height and Cone_Angle

    I'm not clear about how the "rows" work. I'm trying the geometric mean of LED_spacing and my LED_row_spacing.
    Trying to validate the calculations, I ran across 84212-designing-building-led-fixture-22.html#post1102937
    ... and the spreadsheet isn't coming close to real world observations.

    Where to go from here?
  9. Hoppy
    05-08-2012 04:07 AM - permalink
    The number and spacing of LEDs for any size tank can be calculated with reasonable accuracy using a Excel Spreadsheet "calculator" shown here: I doubt that you will want to use Cree XP-G LEDs for that small a tank. Perhaps XR-E would be a better choice.
  10. MPH1
    05-08-2012 03:31 AM - permalink
    Hello Hoppy,

    I understand you are the aquarium lighting mentor. I was sent over here from Nano Reef by Evilc66. I am looking for some help with the lighting for my Aquarium.

    I am new to the aquarium/lighting arena. I have a Fluval 12 gallon tank with fresh water. I am wanting to grow some high light plants and carpet plants.

    I am considering a DIY modification to the lighting. I am looking into getting the CREE XP-G LED's. What do you think is the appropriate amount of cool white led's and the total amount of watts/lumens for the 12 gallon?

    Your input is appreciated!



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  • About Hoppy
    Sacramento, CA
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  • Last Activity: Today 05:06 AM
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  • Join Date: 12-23-2005
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10:19 PM - dukydaf mentioned Hoppy in post High nutrients promote algae growth and are toxic to aquatic life
...very hour. What Hoppy says makes the most ...
01:46 AM - bassbuster23 mentioned Hoppy in post Excel & CO2
... both benefits that Hoppy stated.
02:26 PM - bassbuster23 mentioned Hoppy in post Cleaning your tank
Hoppy.....will the credit ...
04:27 AM - Nick00Merlin mentioned Hoppy in post 125H Gallon First Time Live Plant Project (Lots Of Pictures)
...resting experience. Hoppy has a lot of good in...
11:32 AM - bassbuster23 mentioned Hoppy in post Will this work?
...ssing towards also, Hoppy. Do go ahead - it...
08:14 PM - thedood mentioned Hoppy in post Types of Metricide question. Thanks Hoppy and bassbuster23
02:04 AM - Audionut mentioned Hoppy in post Wrapping my head around KH and co2. Led light questions! Look!
... Minor correction Hoppy. That would be Bica...
12:39 AM - Audionut mentioned Hoppy in post CO2, pH, and dKH question observation from Hoppy. The last paragraph...
01:32 AM - burr740 mentioned Hoppy in post Lighting an Aquarium with PAR instead of Watts
...hat one was made by Hoppy (thanks again man, i...


04:11 PM - Hoppy quoted thedood in post Using Dolomite
Hoppy You have been doing th...
02:52 PM - thedood quoted Hoppy in post Using Dolomite
...t me know:wink2: No Hoppy I think you are righ...
01:36 PM - Hoppy quoted Smooch in post "No fertilizers" - pictures of extremely healthy plants
What is the perfect ratio t...
10:41 AM - Smooch quoted Hoppy in post "No fertilizers" - pictures of extremely healthy plants
To add to the general conf...
11:35 PM - Zorfox quoted Hoppy in post "No fertilizers" - pictures of extremely healthy plants
I don't think we should be...
09:27 PM - Hoppy quoted AWolf in post "No fertilizers" - pictures of extremely healthy plants
For those of us hovering a...
07:31 PM - AWolf quoted Hoppy in post "No fertilizers" - pictures of extremely healthy plants
A few years ago Plantbrain...
03:00 AM - Hoppy quoted SpaceLord in post Old days confessions!
Did you know Walt Disney? I th...
06:50 AM - wastewater quoted Hoppy in post T2 Flourescent Lighting
...ure) and agree with Hoppy's statement about li...
01:35 AM - SpaceLord quoted Hoppy in post Old days confessions!
I was introduced to tropic...
06:06 PM - Hoppy quoted LaquariaJackson in post CO2 system died! Help! What now?
Hoppy, are you suggesting I should ...
11:14 PM - Hoppy quoted dukydaf in post External drop checker
This assumes(wrongly) that e...
10:19 PM - Hoppy quoted bereninga in post External drop checker
So water from the tank will ev...
09:13 PM - bereninga quoted Hoppy in post Effect of shallow substrate?
These answers are about wh...
08:23 PM - bereninga quoted Hoppy in post External drop checker
Theoretically, if the drop...
07:41 PM - Hoppy quoted sevendust111 in post External drop checker
I though you were supposed to put...
07:22 PM - Hoppy quoted AWolf in post Used PH lower, in 1 day, PH return to previous level. How is that possible?
... I don't use CO2. ..; ...
09:58 PM - jeffkrol quoted Hoppy in post Par meter and controls
If you just want to monito...
09:42 PM - Hoppy quoted Diana in post apartments and fish tanks
Get renters insurance and ...
08:18 PM - GrampsGrunge quoted Hoppy in post What is cheapest way to get DIY C02? citric acid, yeast and sugar?
I agree with all but the l...

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