Metal Halides

Discussion in 'DIY' started by Neil H, 26 May 2008.

  1. Neil H

    Neil H Retired Moderator

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    Mod note: Posts moved from http://www.marineaquariumsa.com/showthread.php?t=1994

    I have a new tank, 120 x 60 x 75 lwh,
    would this lighting unit work for me? i want to have a full feef tank and was going to go for 6 or 8 t5's as the mh price was a it steep for my budget
    if i put this in tank a lid and not suspended as shown in thi pic, will i have heat issues???
     
    Last edited by a moderator: 10 Jun 2008
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  3. Rory

    Rory Admin

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    Hey Neil

    This unit is only 60cm long so you would require 2 of them to light a 1.2m. (general guideline is 1 150W MH per 60cm tank length)

    As for the heat issues, yes MH's generate quite a bit of heat. Your "lid" would also have to be quite high as you need to position it at least 15cm above the water, plus a few more cm for the actual unit and some space above it for ventilation. You're looking at a lid at least 30cm high and with some sort of fans in it or just very well ventilated.

    Basically if you want a nice "closed" look to the tank you will have to go with T5's. As for the budget on T5's I think MH's probably work out cheaper at the end of the day. 6 or 8 is more than enough if you go for the GOOD T5's (ATI/Deltec/etc). Unfortunately as with pretty much all reef stuff good=expensive.

    I'd say 2 good T5's should be fine for softies, 4 for LPS, 6 for SPS/anemones. 8 would be rather expensive...
     
  4. OP
    Neil H

    Neil H Retired Moderator

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    thanks for the feedback Rory,

    as a ball park figure what am i looking at for MH?

    This hobby is a very challenging one and i appreciate any advice given!
     
  5. jacquesb

    jacquesb Retired Moderator

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    Hi Neil - the cost of metal halides depend on what you want to get:
    DIY metal halides are split up:
    - starter/control gear: +-R550
    - fitting: +- R185
    - 150 watt double ended BLV 10000K globe (depending WHERE you buy - LampHouse price: +- R330)

    Complete Metal halide unit WITH T5's in, +-R3500 (with one MH unit)
     
  6. OP
    Neil H

    Neil H Retired Moderator

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    Thanks Jacques,

    i am assuming for this diy option one would get the goodies from any building supply shop?

    thanks for the input
     
  7. jacquesb

    jacquesb Retired Moderator

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    Neil - Electrical shop/lighting speciality shop....
     
  8. Rory

    Rory Admin

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    The prices jacques gave are pretty spot on for DIY.

    As for 54W T5's around R300 ea for globes, R200 and something for a dual 54W ballast. If you get waterproof holders they're around R40ea (so would need 4 for 2 globes) but you can just use plain electrical connectors.
     

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