Seasonal Light Hours

Discussion in 'Reef Lighting' started by nc208082, May 26, 2012.

to remove this notice and enjoy 3reef content with less ads. 3reef membership is free.

  1. nc208082

    nc208082 Zoanthid

    Joined:
    Sep 16, 2010
    Messages:
    1,113
    Location:
    Toronto
    I am curious, does anyone adjust the light hours on the tank relative to the time of year?

    Whether it being summer and the longest hours of light vs. winter when the nights are longer.

    In a natural reef the hours of light would obviously fluctuate, is there any benefit to the corals/fish or inverts that anyone can think of by similating the seasonal light patterns to reflect that to be more of nature?

    Maybe possibility of better breeding patterns?
     
  2. Click Here!

  3. 2in10

    2in10 Super Moderator

    Joined:
    Aug 6, 2009
    Messages:
    19,258
    Location:
    Sparks, NV
    I do not as most coral we get are from the tropics and the light period changes very little compared to what we see.
     
  4. Mr. Bill

    Mr. Bill Native Floridian

    Joined:
    May 28, 2011
    Messages:
    4,874
    Location:
    USA
    +1

    Most reefs are on or very near the equator, so they see very little (if any) change in the length of day between seasons.
     
  5. Moxtrain

    Moxtrain Peppermint Shrimp

    Joined:
    Sep 15, 2011
    Messages:
    406
    Location:
    Boise, Id
    Beaten to the punch. That's why I don't change my timers.
     
  6. schackmel

    schackmel Giant Squid

    Joined:
    Jun 4, 2008
    Messages:
    3,153
    Location:
    St. Louis
    some people will adjust the light schedule during summer I imagine to help wthe the temp of the tank....however I dont adjust.

    What I do however is alternate the times the lights come on to simulate the sun coming up and going down. I have (had in my big tank) 4 MH lights and 8 T5s. I set the first timer on the left side of the tank to fire up my first set of T5s, then an hour later the other set of T5 on the right side. Then the first set of MHs etc. Same cycle in evening
     
  7. nc208082

    nc208082 Zoanthid

    Joined:
    Sep 16, 2010
    Messages:
    1,113
    Location:
    Toronto
    Thank you for your replies. I hadn't realized about the location to the equator so I had to look at a map and sure enough most are lined up along the equator.
    Except for Australia(Huge reefs between Australia and New Zealand) and the Galapagos Islands.
    I think and feel Australia has some of the most beautiful reefs and most colorful corals. They are situated further south of the equator. And go through opposite seasonal changes. Winter is during June. In winter I found in June they get on average 10 hours and 24 minutes of light a day. versus summer they get in December and receive 14 hours and 20 mins on average. That's a four hour difference which I think could have some sort of effect.

    I reference it because I love plants of all types whether underwater or above, and in nature the changing of the seasons and light hours directly affect how plants grow, forcing come to mature and flower and force their full color out. I was curious if altering the lighting times would have similar effect in our reefs. Since most coral reefs are situated near the equator they would see little of this, but the ones further south I feel would be affected by this. Look at the Great Barrier Reef and its success and size. Australia has many reefs that have some of the most colorful and different varieties of corals and inverts that I have seen. And can't forget home to many prized fish such as the so beautiful and rare Mcculloch's Clownfish