2x39w or 4x39w

Discussion in 'Lighting' started by Nelson, 2 Apr 2009.

  1. Nelson

    Nelson Member

    Messages:
    2,583
    Location:
    Norfolk
    hi,
    i have the option of 2x39w or 4x39w over 215 litres.only one power lead so no midday burst.i know there's other factors involved(co2,ferts etc)but what would you recommend i use.
    thanks
    neil
    ps.tanks 18" deep and lights are 4" above
     
  2. Themuleous

    Themuleous Member

    Messages:
    4,126
    Location:
    Aston, Oxfordshire
    Def 2 tubes, four and you're asking for trouble IMHO.

    Sam
     
  3. LondonDragon

    LondonDragon Administrator Staff Member

    Messages:
    10,298
    Location:
    London
    Lots of light mean lots of everything else and also means there isn't a lot of margin for error.
    But it depends what you trying to achieve and how much effort you want to put into the tank when it comes to maintenance/prunning/etc...
    I run 144w over my 125 liter tank and it is quite challenging to get the balance right, but since I am running my tank as more a test at the moment than anything else I don't mind the odd burst of algae and learn how to deal with them ;)
    But to keep things simple 2 tubes would be perhaps a safer bet ;)
     
  4. Nelson

    Nelson Member

    Messages:
    2,583
    Location:
    Norfolk
    thanks guys
    neil
     
  5. Ross

    Ross Member

    Messages:
    111
    Location:
    Shetland
    I have two 39watt t5 and a 25 watt t8 and my plants are growing well
     

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