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http://indianaquariumhobbyist.com/community/ :: View topic - LED selection for the tank
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LED selection for the tank
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kapa
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PostPosted: Wed Sep 21, 2016 3:25 am Post subject: LED selection for the tank Reply with quote

 Hi  guys   Very Happy  
 
 After  long  days  putting  new  thread.  BTW  i  want  to  make  LED  hood  for  my  24L*12B*15H  planted  tank.  Substrate  is  Platinum  soil  which  I  am  going  to  switch  to  Laterite.  I  am  very  confused  about  the  selection  of  LED,  so  requesting  help  from  experts.  
 
 I  am  thinking  to  use  1  W*28  LED  as  4  arrays  of  1*7  LED
 
 1)  Is  this  OK  for  the  tank  size  specified  above?  What  would  be  the  distance  between  two  LED  ?  Do  i  need  to  use  Optical  lens  ?  If  yes  then  what  degree  of  lens  needed  ?
 
 2)  What  should  be  the  lumens  /watt  ?  I  have  2  options  regarding  lumens  either  40lm  or  120lm.  Which  would  be  the  best  ?
 
 Wish  to  grow  bacopa  monnieri,  hygrophila  pinnataefida,  rotala  rotundifolia  pink  &  green,  HM,  ludwigia  repens,  alternanthera  reineckii,  rotala  nanjenshan,  cabomba  etc.
 
 Please  guide  in  detail.
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Nidhi
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PostPosted: Wed Sep 21, 2016 2:09 pm Post subject: Re: LED selection for the tank Reply with quote

 Hi  Kapil,
 How  come  you  have  options  for  40  and  120  lumens  in  an  1  watt  LED.
 Which  brand  of  LED  are  talking  about..
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kapa
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PostPosted: Thu Sep 22, 2016 2:06 am Post subject: Re: LED selection for the tank Reply with quote

                                                   
Nidhi  wrote  (View  Post):                
Hi  Kapil,
 How  come  you  have  options  for  40  and  120  lumens  in  an  1  watt  LED.
 Which  brand  of  LED  are  talking  about..                

 
 By  Ad  on  Ebay  
 
 Osram  120lm
 
 40  lm
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Preeths
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PostPosted: Thu Sep 22, 2016 9:54 am Post subject: Re: LED selection for the tank Reply with quote

 You  need  to  build  the  array  matching  the  power  supply.  How  ever  you  can  arrange  the  LED  in  as  many  rows/columns  as  required.
 
 
 Have  you  tried  something  like  this?  LED  apparently  these  LED's  are  for  plant  growth
 
 Slightly  off  topic,  but  the  seller  say's  no  guarantee  for  the  LED's  so  is  it  a  gamble  buying  the  stuff  and  hoping  it  works


Last edited by Preeths on Thu Sep 22, 2016 9:59 am; edited 1 time in total
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Nidhi
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PostPosted: Thu Sep 22, 2016 9:57 am Post subject: Re: LED selection for the tank Reply with quote

 Ok,
      I  would  suggest  Osram,  120  lumens.  although  I  doubt  it  will  really  produce  that  much  lumens..
 30  nos  would  be  perfect,  assemble  in  a  matix  of  10  X  3  row.  Distance  between  led  can  be  2  inches..
 Driver  must  have  have  enough  voltage  out  to  cover  all  the  led  in  series,  or  use  2  or  3  drivers  if  you  cant  find  a  single  driver.
 Just  avoid  connecting  the  LED  in  parallel.
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Nidhi
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PostPosted: Thu Sep 22, 2016 10:31 am Post subject: Re: LED selection for the tank Reply with quote

                                                   
Preeths  wrote  (View  Post):                
You  need  to  build  the  array  matching  the  power  supply.  How  ever  you  can  arrange  the  LED  in  as  many  rows/columns  as  required.
 
 
 Have  you  tried  something  like  this?  LED  apparently  these  LED's  are  for  plant  growth
 
 Slightly  off  topic,  but  the  seller  say's  no  guarantee  for  the  LED's  so  is  it  a  gamble  buying  the  stuff  and  hoping  it  works                

 
 @  Preeths,  may  be  we  can  included  a  couple  of  these  to  get  the  red  spectrum,  or  else  a  mix  of  50-50  fo  coolday  light  and  warm  white  will  be  better,
 If  we  use  too  much  of  those  full  spectrum  light,  the  color  rendering  on  the  plants  will  look  odd.
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Nidhi
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PostPosted: Thu Sep 22, 2016 10:56 am Post subject: Re: LED selection for the tank Reply with quote

 And  I  dont  think  any  LED  are  covered  under  guarantee..  Chuckle
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kapa
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PostPosted: Thu Sep 22, 2016 3:50 pm Post subject: Re: LED selection for the tank Reply with quote

                                                   
Preeths  wrote  (View  Post):                
You  need  to  build  the  array  matching  the  power  supply.  How  ever  you  can  arrange  the  LED  in  as  many  rows/columns  as  required.
 
 
 Have  you  tried  something  like  this?  LED  apparently  these  LED's  are  for  plant  growth
 
 Slightly  off  topic,  but  the  seller  say's  no  guarantee  for  the  LED's  so  is  it  a  gamble  buying  the  stuff  and  hoping  it  works                

 
 Thanks  preeths,   but  don't  have  any  issues  regarding  matching  power  supply  because  will  use  smps.
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kapa
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PostPosted: Thu Sep 22, 2016 3:54 pm Post subject: Re: LED selection for the tank Reply with quote

                                                   
Nidhi  wrote  (View  Post):                
Ok,
      I  would  suggest  Osram,  120  lumens.  although  I  doubt  it  will  really  produce  that  much  lumens..
 30  nos  would  be  perfect,  assemble  in  a  matix  of  10  X  3  row.  Distance  between  led  can  be  2  inches..
 Driver  must  have  have  enough  voltage  out  to  cover  all  the  led  in  series,  or  use  2  or  3  drivers  if  you  cant  find  a  single  driver.
 Just  avoid  connecting  the  LED  in  parallel.                

 
 Nidhi,   why  not  in  parallel?  Sow  how  could  i  connect  them  in  series  as  output  of  smps  is  3.3v  with  15A  source???     Sad
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Nidhi
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PostPosted: Thu Sep 22, 2016 4:45 pm Post subject: Re: LED selection for the tank Reply with quote

 I  prefer  proper  LED  driver  instead  of  SMPS,  parallel  connections  have  risk  of  overloading  other  line  in  case  one  line  fails.
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Preeths
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PostPosted: Thu Sep 22, 2016 5:42 pm Post subject: Re: LED selection for the tank Reply with quote

 You  can  buy  a  regulated  power  supply  online  or  electronics  stores.  They  take  AC  input  and  output  current  and  voltage  as  desired  (you  need  to  turn  2  screws  to  set  the  output  voltage  and  current)  Some  have  a  display,  others  you  need  a  multi-meter  to  verify  the  output.
 
 Edit:   the  advantage  is  you  can  customize  the  brightness  of  LED  by  varying  the  current  (Nidhi,  correct  me  if  i  ma  wrong  here)
 
 I  have  been  reading  up  .....  next  project  once  I  am  back  from  Aquatika  is  to  make  a  LED  light  for  my  planted  tanks.
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kapa
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PostPosted: Thu Sep 22, 2016 9:59 pm Post subject: Re: LED selection for the tank Reply with quote

                                                   
Nidhi  wrote  (View  Post):                
I  prefer  proper  LED  driver  instead  of  SMPS,  parallel  connections  have  risk  of  overloading  other  line  in  case  one  line  fails.                

 
 As  of  now,  I  haven't  decided  to  use  LED  drive.  If  you  have  proper  link  of  the  product  suitable  for  my  requirement  ,  plz  provide  the  link.
 
 BTW  what  about  lens  &  it's  degree  ?  Is  it  necessary  ?  What  would  happen  if  not  used  lens  ?


Last edited by kapa on Thu Sep 22, 2016 10:12 pm; edited 1 time in total
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kapa
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PostPosted: Thu Sep 22, 2016 10:07 pm Post subject: Re: LED selection for the tank Reply with quote

                                                   
Preeths  wrote  (View  Post):                
You  can  buy  a  regulated  power  supply  online  or  electronics  stores.  They  take  AC  input  and  output  current  and  voltage  as  desired  (you  need  to  turn  2  screws  to  set  the  output  voltage  and  current)  Some  have  a  display,  others  you  need  a  multi-meter  to  verify  the  output.
 
 Edit:   the  advantage  is  you  can  customize  the  brightness  of  LED  by  varying  the  current  (Nidhi,  correct  me  if  i  ma  wrong  here)
 
 I  have  been  reading  up  .....  next  project  once  I  am  back  from  Aquatika  is  to  make  a  LED  light  for  my  planted  tanks.                

 
 Please  provide  the  link  to  purchase  the  product.  I  just  want  proper  result  after  it's  installation.
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Nidhi
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PostPosted: Fri Sep 23, 2016 10:17 am Post subject: Re: LED selection for the tank Reply with quote

 Avoid  lenses.  IMO  if  you  use  Lenses  then  you  will  have  to  mount  the  lights  higher  using  hanging  kits.
 with  out  lenses,  you  can  place  the  lighting  in  the  hood  or  around  the  same  height.
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PostPosted: Sat Oct 01, 2016 3:59 pm Post subject: Re: LED selection for the tank Reply with quote

                                                   
Nidhi  wrote  (View  Post):                
Avoid  lenses.  IMO  if  you  use  Lenses  then  you  will  have  to  mount  the  lights  higher  using  hanging  kits.
 with  out  lenses,  you  can  place  the  lighting  in  the  hood  or  around  the  same  height.                

 
 Thanks  bro.  Further  for  heat  sink  i  am  planning  to  use  Aluminium  window  frame  for  cost  effectiveness  Thumb Up   Thumb Up
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