LED diy

Discussion in 'Lighting' started by herkie, 19 Feb 2011.

  1. herkie

    herkie R.I.P.

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  3. Tremayn

    Tremayn

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    problem is getting the correct led's etc.. A guy made a similar sized fixture and it cost him R3000 each!!
     
  4. herkie

    herkie Thread Starter R.I.P.

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    This also seems interesting me, what do you think? The strip lights are interesting.
     
  5. herkie

    herkie Thread Starter R.I.P.

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    A 5 m strip should light my small tank up quite well or what do you think?
     
  6. Johan van Aardt

    Johan van Aardt I love marines [R.I.P.]

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    [​IMG]

    This is my planned led array. have the heatsinks set up already now just the led's and drivers and im ready to go
     
  7. herkie

    herkie Thread Starter R.I.P.

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    Will you please keep us updated on your progress, I would really like to get a led light going in my tank but I can feel that electronic disability blocking me.
     
  8. herkie

    herkie Thread Starter R.I.P.

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    Last edited: 19 Feb 2011
  9. Tremayn

    Tremayn

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    so you can get the Cree LED's from Altech? :) .. How much do they cost?
     
  10. herkie

    herkie Thread Starter R.I.P.

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    It sounds as if they have stock of the led's used in the Reef Central DIY.
    Will post prices and stock availability early next week.
     
  11. Tremayn

    Tremayn

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    cool :) .. I would be interested in making a little spot lamp just to mess around with :) .. But I still think its gonna be pricey :(
     
  12. Johan van Aardt

    Johan van Aardt I love marines [R.I.P.]

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    its 38 rand per cree led and they are the distributors of cree led's in south africa so should always have stock. remember to factor in special power supplies and drivers for the Led's. thats what is really making the budget skyrocket
     
  13. Rory

    Rory Admin MASA Contributor

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    I'd modify that layout slightly. Make the one on the right look like the one on the left so
    a) they match
    b) more white
     
  14. Dane

    Dane

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    I didn't spot that rory... makes good sense tho.
     
  15. Max98

    Max98

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    Just a tip. If you use lenses, group them closely, This will lessen the different colour shadows.

    I have finished my pendants and I am not happy with them.

    If you want more spread but less colour shadows, make groups of white/blue close together.
     
  16. Max98

    Max98

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    When you have less power usage and no lamp replacements for 10 years you quickly make up the extra input cost.
     
  17. Johan van Aardt

    Johan van Aardt I love marines [R.I.P.]

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    If i use more white ill have a yellow tank as im using nuetral white leds and not cool whites, the cool whites give the corals a washed out look.

    You are right the one on the left should be the same as on the left but if you do that in the middle of the tank were the colours have to go together they will not mix well, thats why i wanted to do it this way, but i am open to changes still. if i use lenses i wont use anything more than an 80 degree lens.

    the unit sits about 20cm above the tank and 25 cm above the water, so im hoping the height will help the colours mix nicely
     
  18. Dane

    Dane

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    What kalvin (K) are the whites you're using?
     
  19. Johan van Aardt

    Johan van Aardt I love marines [R.I.P.]

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    4500 - 6000
     
  20. Tremayn

    Tremayn

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    but I doubt that we would use the same LED light for 10 years... How much do the drivers and power supple cost? What if I just made a small spot lamp with like 10 LED's? What would that cost?
     
  21. Max98

    Max98

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    Even 5 years are still a saving.

    If your LED's cost you R6000, and two Halides cost you R3000 it is a R3000 initial extra.

    If you replace the halide globes once a year you already spend another R2000 to replace the two globes.

    The other cost reduction is the heat that is less, so no chiller expense in most cases.

    Then the power. Two 250w halides will use 600+ watts. Thus 2628 kw per year @ 12 hours per day.

    48 Leds will use less than 150w. Thus 657 kw per year @ 12 hours per day.

    That is another +- R2000 worth of saving per year. (Power will soon be over R1 per kw)
     
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