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Featured reducing photoperiod

Discussion in 'Lighting' started by screwloose, Nov 18, 2012.

  1. screwloose

    screwloose Registered

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    Ok,, due to my current circumstances, bills getting bigger etc

    i am looking to cut back a bit, to stop me from downsizing or closing down,,


    i currently run my 2 x 250w halides for 11 hours per day,

    just wondering how far i could cut back say 7 hours over a period of weeks of course,,my blue aquarays are on anyway 7am to 11pm for viewing



    anybody any ideas/thought etc on this ?


    cheers
    Nev
     
  2. Clearwater

    Clearwater Registered

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    7 may be too far but 8 should be i guess if you drop 1 hour per week and the corals will tell you
     
  3. PaulTys

    PaulTys Registered

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    I think 8 would be fine, your tank is full so you dont need rapid growth. I had a couple of SPS frags in our LPS system. Due to an outbreak of dinoflaggelates we dropped photoperiod to just 6 hours and I forgot to put it back. Its now been there for weeks and the SPS were fine. This was 2 x 250W halides.
     
  4. screwloose

    screwloose Registered

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    cheers peeps :)

    that potentially saving me a little anyways :)
     
  5. Funkymonkey

    Funkymonkey Registered

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    I'm sure matt posted about some nice tanks on rc running 7hrs. It's what's made me reduce mine down to the 7/8 hour mark. I'm sure there was a comment about only so much photosynthesis taking place up to so many hours as well. I'll have to go have a look again

    You must have big kahoonas though nev, I'd be scared of changing anything with your tank
     
  6. sityson

    sityson Registered

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    I'm down to 6.5hrs of full light... And seems fine, but I'm no expert, it just works for me..
     
  7. Hazey

    Hazey Registered

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    11hrs does seem excessive although u do get great growth as your snips are always out :p
    7 1/2hrs for me with 2 tubes on 1hr either side of main tubes.
    After lights out I'm now covering my tank partially with a corregated sheet topped off with polystyrene to keep the heat of the tank in & stop the heaters coming on as frequent.


    sent from S3 using tapatalk2
     
  8. screwloose

    screwloose Registered

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    defo not big kahoonas,,


    its either cut back , downsize ( which i dont wanna), or get rid...........so cut back is 1st on list
     
  9. jrob3rts

    jrob3rts Registered

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    I'd assume you probably wouldn't see too much change if you dropped to 8-9 hrs over a period of time. It would be interesting to see the impact of going shorter though.
     
  10. Whipitup

    Whipitup Registered

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    I don't suppose it's worth mentioning the LED option?
























































    I didn't think so.
     
  11. sityson

    sityson Registered

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    Lol.....
     
  12. Funkymonkey

    Funkymonkey Registered

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    My heaters rarely on through the day but on most of the night. Once the lumenarcs are on the heat off them keeps things warm. With leds I reckon the heater would be on a hell of a lot more.

    Have you worked out what you'd save dropping the hours nev? If you know what you pay kWh there's some easy calculators to work it out
     
  13. screwloose

    screwloose Registered

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    well i cut back 1 full hour,,and if anything the tank has looked better for it...however i forgot to do qanymore..

    i am picking a t5 unit up int morning so will be all change anyways..
     
  14. ged@fishnochips

    [email protected] Registered

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    Them new lights look ace mate, should glow even more your tank, under them.
     
  15. jamesfirth1

    jamesfirth1 Registered

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    Will be interested to see how the corals change under T5, with some of my corals they totally changed colour. Just watch out for bleaching, I had my T5 high up and I still bleached some corals moving from 250w halides.
     
  16. screwloose

    screwloose Registered

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    just getting the right bulb combo could potentially do my head in..lol

    gonna try for 16k isk
     
  17. killi

    killi Moderator & Jedi Master

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    Have mine on for 7 hours Nev with 2act a hour either side,
     
  18. MinerWilly

    MinerWilly Registered

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    You thought about trying siesta lighting maybe 4 hours on, 4 hours off, then 4 hours on again ?

    Some people run planted tanks that way (I have one set up like that), and there are some threads on the net with people doing it on salty tanks as well (they usually quote some evidence about photosynthesis stopping/plateauing after a certain number of hours and so the light is less effective after that time).
     
  19. screwloose

    screwloose Registered

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    t5 or halides ?

    yeh have read the same too ....however,,it would get on mi paps no lights through the day
     
  20. killi

    killi Moderator & Jedi Master

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    T5 mate :thumbup1:
     
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