mercury vapor - your thoughts?

Discussion in 'Lighting' started by Dan Crawford, 28 Jul 2008.

  1. Dan Crawford

    Dan Crawford Founder Staff Member

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    Hi all, i've just acquired two Arcadia 3 series 125w mercury vapor pendants and wondered what your thoughts were. I've gotta replace the bulbs and lampspecs have 4100K bulbs but thats it. Dennerle do some too @ 4000.
    I have a 100w Arcadia 80cm luminaire at the moment and i'm thinking of replacing it with either one or both over my 80cm (160l)
    I'd be interested in your thoughts.

    Cheers

    Dan
     
  2. ceg4048

    ceg4048 Expert/Global Moderator Staff Member

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    Hey BigDan!
    The K ratings are all over the map these days. Theoretically the 4000K should appear reddish/orangyish but these are sometimes meaningless. It's better if they gave a wavelength value, then you'd kind of know what kind of visual impact to expect. They might look a bit dim and eerie, but then again they might be OK. The plants won't care though.

    Cheers,
     
  3. Dan Crawford

    Dan Crawford Founder Staff Member

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    thanks pal! I'm gonna put them up, lets have a go hey, what harm can i do? it's only 4 holes in the ceiling :rolleyes:
     
  4. Wolfenrook

    Wolfenrook Member

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    Give em a try, for many years mercury vapour pendants were considered the bees knees for planted tanks.

    Ade
     
  5. JazzyJeff

    JazzyJeff Member

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    I have been running them for the last 6 years over my 500litre discus tank, i really rate them !!!!!!!!!
     
  6. Dan Crawford

    Dan Crawford Founder Staff Member

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    what do ya hate about them pal?
     
  7. JamesM

    JamesM Member

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    Specsavers? ;)
     
  8. ceg4048

    ceg4048 Expert/Global Moderator Staff Member

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    I think JazzyJeff states that he "rates" it (high?), not that he "hates" it. I'm assuming that's a good thing? :?

    Cheers,
     
  9. oldwhitewood

    oldwhitewood Member

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    They're a bit old hat now IMO. Most people use T5 or MH. Some are now using LEDs but I've got no experience of them.

    If you like the colour of the lights then of course it's down to personal preference, I'm not keen on the yellow cast you get from Mercury Vapour.
     
  10. Dan Crawford

    Dan Crawford Founder Staff Member

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    He he, you know what i'm like :rolleyes: :lol:
     
  11. JazzyJeff

    JazzyJeff Member

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    Have too agree the colour of them is a bit yellowish but I dont mind that, they still make my discus look good !!!!!
     
  12. Wolfenrook

    Wolfenrook Member

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    You could always balance the yellow out by adding a plant tube at the back of the tank to offset it.

    Ade
     
  13. Dan Crawford

    Dan Crawford Founder Staff Member

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    Well i've suspended them from the ceiling and they look awesome. The colour is teffific, there is currently one pink and one white bulb in there and i'm more than happy with it, better than the colours from my Dennerle T5's IMO, well cuffed.

    Anyone want an 80cm arcadia T5 luminaire? :)
     
  14. vauxhallmark

    vauxhallmark Member

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    So did you put them both over the tank in the end?

    I used to run a tank under MV, and I loved it - really brings out the green of plants for me. Also loved the 'sunrise effect' when they go on - much nicer than flourescent flickering!

    Can you take a pic of them over the tank? Let us know how your plants get on with them.
     
  15. Dan Crawford

    Dan Crawford Founder Staff Member

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    Here they are, i really like them, the look of the luminaire it's self and the color of the lamps.
    I've raised the rear one up a bit so you can see them both. The Arcadia suspension kit is genius!
    IMG_1027Small.jpg
    IMG_1026Small.jpg
     
  16. Wolfenrook

    Wolfenrook Member

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    Holy carp that looks like a LOT of light! :wideyed:

    Ade
     
  17. Dan Crawford

    Dan Crawford Founder Staff Member

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    Yup :D 250w over 160L, thats 1.5 watts per liter and like 5.5 watts per gallon :lol:
     
  18. LondonDragon

    LondonDragon Administrator Staff Member

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    Algae magnets :p they look great :)
     
  19. Dan Crawford

    Dan Crawford Founder Staff Member

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    We'll see, it'll take some tweeking and NUFF co2 but i recon i can handle it. Watch this space....
     
  20. LondonDragon

    LondonDragon Administrator Staff Member

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    Yeah will be great to see the end results, I am now trying 6x24w over my Rio 125 just for testing too. But still nothing compared to what you going to try, what kind of photo periods you plan to run?
     

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