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http://indianaquariumhobbyist.com/community/ :: View topic - Best light for red plants
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Best light for red plants
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Manu1979
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PostPosted: Mon Feb 23, 2009 5:40 pm Post subject: Best light for red plants Reply with quote

 Which  is  the  best  kelvin  rating  to  grow  red  plants?  I  am  using  8000k  and  6500k  T8.  The  ludwigia  under  the  8000k  lights  are  showing  good  red  colour,  however,  the  ones  below  6500k  are  becoming  green.
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Prem kk
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PostPosted: Mon Feb 23, 2009 6:42 pm Post subject: Re: Best light for red plants Reply with quote

                                                   
Manu1979  wrote  (View  Post):                
Which  is  the  best  kelvin  rating  to  grow  red  plants?  I  am  using  8000k  and  6500k  T8.  The  ludwigia  under  the  8000k  lights  are  showing  good  red  colour,  however,  the  ones  below  6500k  are  becoming  green.                

 
 I  guess  it  should  be  the  other  way  round.  
 
 Red  plants  grow  well  in  6500  Kelvin.  
 
 Lets  wait  for  the  experts  to  comment.
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Tirtha C
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PostPosted: Mon Feb 23, 2009 7:24 pm Post subject: Re: Best light for red plants Reply with quote

 I  think  light  is  not  the  only  factor  to  see  Red  plants  Red.  Nitrate  and  Phosphate  level  also  plays  a  major  role.  Personaly  I  found  all  my  red  plants  turned  green  under  a  mix  of  4200K  and  6500K  MH.  ¬†And  both  the  MH  is  having  a  good  spectrum  ration  of  Red/Green/Blue.
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Rana
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PostPosted: Mon Feb 23, 2009 9:25 pm Post subject: Re: Best light for red plants Reply with quote

 IME,  Red  plants  grow  better  in  blue  spectrum,  however  to  enjoy  the  red  color  you  need  to  provide  some  lights  from  red  spectrum  end  along  with  blue  spectrum  that  helps  the  plants  to  appear  red.
 
 Low  nitrate,  sudden  sprut  of  phosphate  and  adequate  pottasium  helps  to  prevent  red  plants  turn  green.  Good  phosphate  level  in  substrate  is  required.
 
 Also  light  intensity  plays  important  role.  We  all  notice  that  leaves  nearer  to  lights  turn  red  easily.
 
 regards
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Manu1979
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PostPosted: Mon Feb 23, 2009 10:00 pm Post subject: Re: Best light for red plants Reply with quote

 One  more  thing,  I  have  8000k  tubes  in  front  and  6500k  at  back.  Is  it  OK  to  put  8000,  6500  and  4000k  tubes  in  an  assorted  manner,  since  I  have  red  plants  in  my  foreground  as  well  as  background(red  mint).
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abhi_123
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PostPosted: Mon Feb 23, 2009 10:03 pm Post subject: Re: Best light for red plants Reply with quote

 which  red  plant  u  have  in  fore  ground  ?  Surprised
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Manu1979
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PostPosted: Mon Feb 23, 2009 10:23 pm Post subject: Re: Best light for red plants Reply with quote

 Its  a  small  hedge  made  of  ludwigia  dividing  the  foreground.
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abhi_123
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PostPosted: Mon Feb 23, 2009 10:33 pm Post subject: Re: Best light for red plants Reply with quote

 Better  to  put  ludvigia  at  the  back.
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Manu1979
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PostPosted: Mon Feb 23, 2009 10:49 pm Post subject: Re: Best light for red plants Reply with quote

 Well,  am  right  now  concerned  with  the  spectrum,  not  scaping  :-).
 
 I  request  the  senior  experienced  members  to  guide  me.
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madhu_ulysses
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PostPosted: Tue Feb 24, 2009 12:09 am Post subject: Re: Best light for red plants Reply with quote

 I  haven't  actually  tried  other  lights,  but  still  quite  a  few  red  plants  that  I  had  looked  actually  red  under  TruLites  and  that  included  M.  tuberculatum,  which  eventually  went  off  later  with  our  own  tropical  summer.
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Seetharam
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PostPosted: Tue Feb 24, 2009 2:01 am Post subject: Re: Best light for red plants Reply with quote

                                                   
Manu1979  wrote  (View  Post):                
One  more  thing,  I  have  8000k  tubes  in  front  and  6500k  at  back.  Is  it  OK  to  put  8000,  6500  and  4000k  tubes  in  an  assorted  manner,  since  I  have  red  plants  in  my  foreground  as  well  as  background(red  mint).                

 
 Yes  you  can
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Shreyasmrao
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PostPosted: Tue Feb 24, 2009 1:11 pm Post subject: Re: Best light for red plants Reply with quote

 If  you  have  foreground  plants  like  Glosso  Stigma,  they  will  do  well  under  8000K  as  the  penetration  of  bluer  lights  is  more.  Red  light  gets  cut  off  first  and  the  more  bluer  the  lights  the  more  deeper  they  will  penetrate.  So  8000K  will  reach  plants  at  the  bottom  helping  foreground  plants  to  grow.  Since  red  lights  have  the  least  penetration,  and  since  they  give  the  red  colour  to  the  plants  (apart  from  the  minerals  as  Tirtha  has  mentioned)  your  plants  will  tend  to  be  more  red  on  the  top.  You  can  use  these  lights  in  whatever  order  you  want  to,  but  since  foreground  plants  need  lights  at  the  bottom,  it  is  better  to  have  8000K  in  the  front  where  you  plan  to  have  your  foreground.
 
 Hope  I  have  been  helpful  and  seniors  please  correct  me  if  I  am  wrong.
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madhu_ulysses
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PostPosted: Tue Feb 24, 2009 4:47 pm Post subject: Re: Best light for red plants Reply with quote

 Shreyas,
 Blue  disperses  more  than  Red.   Thats  why  the  sky  is  red  in  morning  and  evening.
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sandeepraghuvanshi
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PostPosted: Tue Feb 24, 2009 5:33 pm Post subject: Re: Best light for red plants Reply with quote

                                                   
Shreyasmrao  wrote  (View  Post):                
If  you  have  foreground  plants  like  Glosso  Stigma,  they  will  do  well  under  8000K  as  the  penetration  of  bluer  lights  is  more.  Red  light  gets  cut  off  first  and  the  more  bluer  the  lights  the  more  deeper  they  will  penetrate.  So  8000K  will  reach  plants  at  the  bottom  helping  foreground  plants  to  grow.  Since  red  lights  have  the  least  penetration,  and  since  they  give  the  red  colour  to  the  plants  (apart  from  the  minerals  as  Tirtha  has  mentioned)  your  plants  will  tend  to  be  more  red  on  the  top.  You  can  use  these  lights  in  whatever  order  you  want  to,  but  since  foreground  plants  need  lights  at  the  bottom,  it  is  better  to  have  8000K  in  the  front  where  you  plan  to  have  your  foreground.
 Hope  I  have  been  helpful  and  seniors  please  correct  me  if  I  am  wrong.                

 Red  Light  has  the  maximum  penetration,  that  is  why  it  is  used  as  danger  signal,  so  that  it  is  visible  in  nearly  every  condition.   Smile  
 Red  pigment  in  plants  is  not  very  efficent  in  phosyenthesis,  and  under  low  light  conditons,  plants  start  producing  green  pigment  which  is  more  efficient  in  photosyenthesis.  So  under  high  lights  red  plants  stay  red,  under  low  lights  they  tend  to  become  green.
 I  am  not  sure  what  is  the  effect  of  spectrum  on  their  colour
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Madan
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PostPosted: Tue Feb 24, 2009 5:53 pm Post subject: Re: Best light for red plants Reply with quote

 Sandeep  blue  light  penetrates  deepest  through  water.
 Deep  water  corals  need  blue  lights  because  that  is  what  they  are  accustomed  to.
 More  than  8  feet  deep,  all  Red  color  appears  black  because  red  light  does  not  get  that  deep  under  water.
 
 Orange  or  Optical  Yellow  as  it  is  called  is  more  visible  in  any  ambient  light  conditions  in  air.
 That's  way  all  Danger  signs  and  Life  saving  appliances  are  colored  Orange.
 
 Red  is  for  Danger  because  people  are  afraid  of  blood.  Danger  signals  that  need  to  be  visible  in  poor  ambient  light/fog  etc  are  Orange.
 
 Give  plants  enough  light  and  they  will  turn  red.  Red  pigmentation  is  a  stress  reaction  in  plants.
 Excess  light  they  do  not  require  chlorophyll  to  photosynthesize  so  much,  they  turn  red.
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