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DIY LED for planted tank(Trial fixture upgrade)
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Rajdeep_Banik
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PostPosted: Sat Aug 15, 2015 1:27 pm Post subject: Re: DIY LED for planted tank(Trial fixture upgrade) Reply with quote

 Hey  Mr.  Andrew,  are  your  LED  lights  working  properly?  Some  of  my  lights  are  flickering,  most  of  the  lights  are  have  only  6  diodes  working  (a  10W  LED  chip  have  9  diodes  inside  it)  and  1  chip  is  nearly  dead!   Sad
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PostPosted: Tue Aug 18, 2015 10:19 am Post subject: Re: DIY LED for planted tank(Trial fixture upgrade) Reply with quote

 Its  because  your  are  not  using  a  driver  for  LED's.  Just  connecting  an  SMPS  and  current  limiting  resistor  to  a  LED  is  not  the  right  method.
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Andrew
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PostPosted: Tue Aug 18, 2015 3:44 pm Post subject: Re: DIY LED for planted tank(Trial fixture upgrade) Reply with quote

                                                   
Rajdeep_Banik  wrote  (View  Post):                
Hey  Mr.  Andrew,  are  your  LED  lights  working  properly?  Some  of  my  lights  are  flickering,  most  of  the  lights  are  have  only  6  diodes  working  (a  10W  LED  chip  have  9  diodes  inside  it)  and  1  chip  is  nearly  dead!   Sad                

 
 Hi  Sorry  for  late  response,  like  Shelly  mentioned  using  smps  directly  not  good  for  led  because  of  variable  current  you  need  to  make  some  changes  in  your  smps  already  i  have  posted  the  link  how  to  make  smps  constant.  and  again  it  depends  on  the  led  manufacture  also  but  to  understand  your  issue  you  need  to  provide  me  more  details  like  your  led  spec  the  driver  what  you  use  whether  it's  parallel  or  series  connection.
 
 I  made  2  led  fixture  which  working  fine  without  any  issues  till  now.
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asheesh
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PostPosted: Tue Aug 18, 2015 9:27 pm Post subject: Re: DIY LED for planted tank(Trial fixture upgrade) Reply with quote

 also  please  make  sure  you  have  a  very  good  heat  sink
 if  you  are  able  to  touch  heat  sink  without  burning  your  fingers  after  running  it  for  2-3  hours  then  its  good  to  use,  else  use  fans  to  reduce  the  temperature.
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PostPosted: Mon Sep 07, 2015 12:47 pm Post subject: Re: DIY LED for planted tank(Trial fixture upgrade) Reply with quote

 Dear  Gurus,  Forum  members  and  Andrew,
 
 Thank  you  for  creating  a  DIY  light  system,  now  I  am  in  the  verge  of  creating  one  for  mine.  I  am  not  an  expert  in  this  area,  especially  in  planted  aquas.  I  don't  even  know  the  varieties  of  plants  that  are  used  in  aquarium.
 
 I  am  from  Chennai,  I  got  good  access  to  Aquasstar  and  richie  street.  I  went  to  Aquastar  and  bought  some  low  light  plants.  I  do  have  a  3.3  W  clipped  LED  light  for  time  being  and  can  see  few  pearlings  here  and  there.
 
 DIY  part:
 
 Tank  Size:  20L  x  10B  x  12H  (I  know  tank  size  is  little  less,  I  bought  it  for  my  son)
 Caculation  Per  Guidelines:  20  x  10  /  22 =  9  (3  Watt)  LED's.
 Rounding  off  to  10  3W  LED's  comes  around  30  Watts  total.
 
 I  am  planning  to  procure  things  from  Ebay  or  Richie  St.  
 
 Option  1:  (SMD  LED  Setup)
 
 LED  Driver:  http://www.ebay.in/itm/ZVision-12V-10A-DC-Power-Supply-Driver-for-CCTV-and-LED-Strip-light-Lamp-Wrty-/262031591022?hash=item3d024cc66e
 LEDs:  http://www.ebay.in/itm/Epistar-10-Pcs-High-power-super-Bright-3W-SMD-LED-Diode-Bulb-120-LUMEN-350mA-FC-/321853204902?hash=item4aeff229a6
 
 Color  /  Temp  :--  Cool  Day  White/6500-9000k  
 Volts :--  3.0VDC  to  3.2VDC  
 Current :--  Approx  350mAh  
 Lumens:-- 140-160  LM  
 Life  Time:--  100,000  Hours  
 Packaging :  Bulk  
 
 Questions  (Please  correct  my  knowledge):
 
 1.  Using  10  3W  LED's  from  above  link,  I  might  require  3.5  Amps  totally  right?  
      In  that  case  can  I  use  10A  driver,  will  it  burn  the  LEDs?
 
 2.  Also  in  some  LED's  the  operating  voltage  is  9v  to  12v,  and  forward  voltage  (Vf)  is  3.0  to  3.5  (for  3W  LED's).  
      In  this  case  my  understanding  is  we  require  close  to  30  volts  to  drive  the  voltage  due  to  loss  of  3.0  volts  on  each  leds.
      Or  do  we  just  use  the  above  mentioned  12v  driver  to  run  these  LED's?
 
 3.  Are  3W  (10  nos)  LED  bright  enough  for  human  eyes  for  a  given  tank  surface  area?  I  have  seen  in  shops  they  produce  somewhat  bright  spots.  (I  am  aware  that  plants  do  see  a  different  spectrum)
 
 
 Option  2:  (LED  Strip  Setup)
 
 On  the  other  hand,  most  commonly  available  stuff  is  LED  strip  of  cool  whites  and  blues.  Can  I  just  use  5  strips  of  18"  each  and  make  it  usuable  for  plants?
 
 In  that  case  will  the  above  mentioned  driver  sufficient  of  should  I  bump  down  the  volts?
 
 Please  help  me  to  clarify  these,  I  am  just  starting  out  a  cheap  planted  setup  (low  tech),  I  am  more  interested  to  grow  some  grass(carpet)  type  ones  in  future.
 
 
 Thanks  again  friends!
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aqua_laboratory
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PostPosted: Tue Sep 22, 2015 2:01 am Post subject: Re: DIY LED for planted tank(Trial fixture upgrade) Reply with quote

                                                   
Andrew  wrote  (View  Post):                

 The  formula  used  is  Numbers  of  LED  to  use  =  The  area  of  footprint  of  your  tank  /  22  which  is  for  3watt  cree  led  or  equivalent  quality.                

 
 Hi  Andrew,  I  just  joined  this  forum  a  few  mins  back  this  is  my  very  first  post  in  this  forum  and  thanks  a  lot  for  sharing  all  the  infos  and  hard  work  put  in  experimentation.
 
 As  I  was  going  through  the  posts,  I  couldnt  understand  this  '22'  factor.  Will  you  please  explain  what  this  '22'  means  and  how  is  it  derived(roughly,  jst  an  idea,  no  calculations).  
 Also,  is  this  valid  for  tanks  of  all  height?  because  more  the  photon  travels  thru  water,  more  it  looses  the  energy  level.  and  hence  lesser  on  the  blue  side.  so  in  case  of  high  depth  tank  to  low  depth  tank  of  same  base  area,  how  is  '22'  justified?   Confused
 Also  the  LEDs  come  in  different  temperatures(not  sure  abt  cree  or  other  costly  ones  but  ebay  does  hav  different  temps),  in  that  case  how  should  one  proceed  towards  mixing  the  temperatures?  or  does  it  apply  for  6500K  only?
 
 Thanks  a  lot...  Smile
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bharadwazputta
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PostPosted: Tue Sep 22, 2015 5:46 pm Post subject: Re: DIY LED for planted tank(Trial fixture upgrade) Reply with quote

 Why  is  the  LED  blinking?
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PostPosted: Tue Dec 01, 2015 2:01 am Post subject: Re: DIY LED for planted tank(Trial fixture upgrade) Reply with quote

 Hello  Andrew,
 
 Inspired  by  your  post,  I  am  planning  to  build  one  for  my  planted  tank.  
 I  noticed  earlier  you  were  using  SMPS  of  ENTER  500W  E-500A,  is  this  SMPS  works  fine?  without  issues  you  mentioned  in  yous  posts  like  less  voltage  in  3.3  V  if  12  V  is  loaded?  or  LED  flickering?
 
 my  tank  size  is  24"  (L)  x  18"  (W)  x  18"  (H),  I  am  planning  to  install  10w  x  8  (white)  and  1w  x  2  (blue)  which  turns  out  to  be  8.6  Amps  and  can  work  with  the  SMPS  mentioned  in  your  post.
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Trayderji
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PostPosted: Tue Jun 28, 2016 7:59 pm Post subject: Re: DIY LED for planted tank(Trial fixture upgrade) Reply with quote

 A  lot  of  useful  information  here...thanks  Andrew  for  that.
 
 I  have  some  queries  in  this  case.
 
 1.  how  did  you  stick   the  led's  to  the  aluminium  heat  sink?  using  nut/bolts?
 2.  is  it  necessary  to  use  the  heat  absorbing  paste?
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PostPosted: Mon Jul 04, 2016 10:32 pm Post subject: Re: DIY LED for planted tank(Trial fixture upgrade) Reply with quote

                                                   
bharadwazputta  wrote  (View  Post):                
Why  is  the  LED  blinking?                

 you  are  giving  more  current  than  required
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PostPosted: Tue Jul 05, 2016 6:35 pm Post subject: Re: DIY LED for planted tank(Trial fixture upgrade) Reply with quote

                                                   
sekhar4web  wrote  (View  Post):                
Dear  Gurus,  Forum  members  and  Andrew,
 
 Thank  you  for  creating  a  DIY  light  system,  now  I  am  in  the  verge  of  creating  one  for  mine.  I  am  not  an  expert  in  this  area,  especially  in  planted  aquas.  I  don't  even  know  the  varieties  of  plants  that  are  used  in  aquarium.
 
 I  am  from  Chennai,  I  got  good  access  to  Aquasstar  and  richie  street.  I  went  to  Aquastar  and  bought  some  low  light  plants.  I  do  have  a  3.3  W  clipped  LED  light  for  time  being  and  can  see  few  pearlings  here  and  there.
 
 DIY  part:
 
 Tank  Size:  20L  x  10B  x  12H  (I  know  tank  size  is  little  less,  I  bought  it  for  my  son)
 Caculation  Per  Guidelines:  20  x  10  /  22 =  9  (3  Watt)  LED's.
 Rounding  off  to  10  3W  LED's  comes  around  30  Watts  total.
 
 I  am  planning  to  procure  things  from  Ebay  or  Richie  St.  
 
 Option  1:  (SMD  LED  Setup)
 
 LED  Driver:  http://www.ebay.in/itm/ZVision-12V-10A-DC-Power-Supply-Driver-for-CCTV-and-LED-Strip-light-Lamp-Wrty-/262031591022?hash=item3d024cc66e
 LEDs:  http://www.ebay.in/itm/Epistar-10-Pcs-High-power-super-Bright-3W-SMD-LED-Diode-Bulb-120-LUMEN-350mA-FC-/321853204902?hash=item4aeff229a6
 
 Color  /  Temp  :--  Cool  Day  White/6500-9000k  
 Volts :--  3.0VDC  to  3.2VDC  
 Current :--  Approx  350mAh  
 Lumens:-- 140-160  LM  
 Life  Time:--  100,000  Hours  
 Packaging :  Bulk  
 
 Questions  (Please  correct  my  knowledge):
 
 1.  Using  10  3W  LED's  from  above  link,  I  might  require  3.5  Amps  totally  right?  
      In  that  case  can  I  use  10A  driver,  will  it  burn  the  LEDs?
 
 2.  Also  in  some  LED's  the  operating  voltage  is  9v  to  12v,  and  forward  voltage  (Vf)  is  3.0  to  3.5  (for  3W  LED's).  
      In  this  case  my  understanding  is  we  require  close  to  30  volts  to  drive  the  voltage  due  to  loss  of  3.0  volts  on  each  leds.
      Or  do  we  just  use  the  above  mentioned  12v  driver  to  run  these  LED's?
 
 3.  Are  3W  (10  nos)  LED  bright  enough  for  human  eyes  for  a  given  tank  surface  area?  I  have  seen  in  shops  they  produce  somewhat  bright  spots.  (I  am  aware  that  plants  do  see  a  different  spectrum)
 
 
 Option  2:  (LED  Strip  Setup)
 
 On  the  other  hand,  most  commonly  available  stuff  is  LED  strip  of  cool  whites  and  blues.  Can  I  just  use  5  strips  of  18"  each  and  make  it  usuable  for  plants?
 
 In  that  case  will  the  above  mentioned  driver  sufficient  of  should  I  bump  down  the  volts?
 
 Please  help  me  to  clarify  these,  I  am  just  starting  out  a  cheap  planted  setup  (low  tech),  I  am  more  interested  to  grow  some  grass(carpet)  type  ones  in  future.
 
 
 Thanks  again  friends!                

   First  of  all  they  are  not  LED  drivers.They  are  just  smps  /  power  supply  .  your  leds  will  burn  after  few  days  without  a  LED  driver  .  buy  meanwell  LDD  drivers
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arunsai
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Joined: Aug 05, 2011
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PostPosted: Tue Jul 05, 2016 6:39 pm Post subject: Re: DIY LED for planted tank(Trial fixture upgrade) Reply with quote

                                                   
Trayderji  wrote  (View  Post):                
A  lot  of  useful  information  here...thanks  Andrew  for  that.
 
 I  have  some  queries  in  this  case.
 
 1.  how  did  you  stick   the  led's  to  the  aluminium  heat  sink?  using  nut/bolts?
 2.  is  it  necessary  to  use  the  heat  absorbing  paste?                

 1.  Star  type  SMD  needs  nuts  and  bolts  to  get  it  mounted  
 2.  You  need  thermal  compound  otherwise  the  heat  generated  in  the  LED  junction  won't  transfer  to  heat-sink  effectively.
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