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http://indianaquariumhobbyist.com/community/ :: View topic - LED Build Journal - Completed and some experiments
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LED Build Journal - Completed and some experiments
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Preeths
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PostPosted: Tue Mar 14, 2017 6:25 pm Post subject: Re: LED Build Journal - Completed Reply with quote

 I  have  been  keeping  hair  grass.  The  next  few  week  will  give  me  a  good  idea  about  how  they  respond  to  Cree  LED's  and  the  increased  light.
 
 I  have  some  wild  collected  hydrocotyl  in  an  other  tank  with  a  patch  of  UG.  UG  dry  start  was  a  failure  so  have  to  observe  what  happens  in  this  tank.
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garothmaan
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PostPosted: Tue Mar 21, 2017 10:26 am Post subject: Re: LED Build Journal - Completed Reply with quote

 get  plants  which  are  from  immersed  growth,  it  will  be  the  best  test  IMO  Smile
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PostPosted: Wed Mar 22, 2017 4:18 pm Post subject: Re: LED Build Journal - Completed Reply with quote

                                                   
garothmaan  wrote  (View  Post):                
get  plants  which  are  from  immersed  growth,  it  will  be  the  best  test  IMO  Smile                

 
 I  have  found  that  TC  plants  are  pretty  good,  if  you  give  CO2  and  sufficient  lighting  they  grow  well.  Immersed  growth  does  not  do  well  in  a  dry  start,  but  the  hormone  loaded  TC  plants  grow  well.  Planting  Hair  grass  is  a  PITA  if  you  are  doing  it  in  tank  filled  with  water.
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Preeths
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PostPosted: Thu Apr 06, 2017 7:43 pm Post subject: Re: LED Build Journal - Completed Reply with quote

 Plant  growth  with  6500K  CREE  LED's  is  absolutely  fantastic.  All  plants  start  pearling  in  a  few  hours.  I  trimmed  the  hair  grass,  and  its  growing  back  well.  Full  4000-8400K  spectrum  Bridgelux  LED's  are  in  transit,  so  hopefully  I  will  be  setting  up  a  planted  tank  with  these  LED's  in  the  coming  weeks.
 
 Really  Interested  in  seeing  how  a  Dry  start  would  work  with  full  spectrum  chips  ...
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PostPosted: Fri Apr 07, 2017 10:22 am Post subject: Re: LED Build Journal - Completed Reply with quote

                                                   
Preeths  wrote  (View  Post):                
Plant  growth  with  6500K  CREE  LED's  is  absolutely  fantastic.  All  plants  start  pearling  in  a  few  hours.  I  trimmed  the  hair  grass,  and  its  growing  back  well.  Full  4000-8400K  spectrum  Bridgelux  LED's  are  in  transit,  so  hopefully  I  will  be  setting  up  a  planted  tank  with  these  LED's  in  the  coming  weeks.
 
 Really  Interested  in  seeing  how  a  Dry  start  would  work  with  full  spectrum  chips  ...                

 
 Nice  to  hear  that  plants  growing  good.  Could  you  please  specify  the  exact  series  of  cree  LED  using  ?  i.e.  Cree-XPE,  Cree  XME  or  any  other.  Please  share  the  link  to  purchase  &  tank  pics  as  well.  Thanks  in  advance  !
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Preeths
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PostPosted: Fri Apr 07, 2017 4:24 pm Post subject: Re: LED Build Journal - Completed Reply with quote

 Cree  XML  T6  is  the  one  I  am  using.  Search  on  Aliexpress  for  "cree  xlamp  xm-l2  xml2  t6"  lots  of  sellers.
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PostPosted: Wed Apr 19, 2017 1:29 am Post subject: Re: LED Build Journal - Completed Reply with quote

 Hi  preeths,
 
 Can  you  please  share  your  experience  with  the  full  spectrum  led's.  How  was  the  plant  growth  compared  to  CREE  LED's.
 
 Also,  per  my  observation  full  spectrum  led's  seems  to  appear  pinkish  as  shown  below?  Dont  we  get  full  spectrum  in  white  light?
 
 http://www.ebay.in/itm/10-Piece-3w-Full-Spectrum-LED-Bridgelux-Chip-Indoor-Plant-Grow-Light-400nm-840nm-/172464318543?hash=item2827aca84f  
 
 
                                                 
Preeths  wrote  (View  Post):                
Plant  growth  with  6500K  CREE  LED's  is  absolutely  fantastic.  All  plants  start  pearling  in  a  few  hours.  I  trimmed  the  hair  grass,  and  its  growing  back  well.  Full  4000-8400K  spectrum  Bridgelux  LED's  are  in  transit,  so  hopefully  I  will  be  setting  up  a  planted  tank  with  these  LED's  in  the  coming  weeks.
 
 Really  Interested  in  seeing  how  a  Dry  start  would  work  with  full  spectrum  chips  ...                
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Preeths
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PostPosted: Wed Apr 19, 2017 2:00 pm Post subject: Re: LED Build Journal - Completed Reply with quote

                                                   
n70me  wrote  (View  Post):                
Hi  preeths,
 
 Can  you  please  share  your  experience  with  the  full  spectrum  led's.  How  was  the  plant  growth  compared  to  CREE  LED's.
 
 Also,  per  my  observation  full  spectrum  led's  seems  to  appear  pinkish  as  shown  below?  Dont  we  get  full  spectrum  in  white  light?
 
 http://www.ebay.in/itm/10-Piece-3w-Full-Spectrum-LED-Bridgelux-Chip-Indoor-Plant-Grow-Light-400nm-840nm-/172464318543?hash=item2827aca84f  
 
                                                   
Preeths  wrote  (View  Post):                
Plant  growth  with  6500K  CREE  LED's  is  absolutely  fantastic.  All  plants  start  pearling  in  a  few  hours.  I  trimmed  the  hair  grass,  and  its  growing  back  well.  Full  4000-8400K  spectrum  Bridgelux  LED's  are  in  transit,  so  hopefully  I  will  be  setting  up  a  planted  tank  with  these  LED's  in  the  coming  weeks.
 
 Really  Interested  in  seeing  how  a  Dry  start  would  work  with  full  spectrum  chips  ...                
               

 
 Have  not  set  this  up  yet,  I  want  to  give  the  Cree  LED's  at  least  8  weeks  before  replacing  them.  The  new  LED's  are  have  not  arrived,  they  are  still  in  transit.  I  will  update  here  once  I  set  it  up.  the  Cree's  will  Continue  for  an  other  4  weeks  at  least.
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Preeths
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PostPosted: Sat Jun 10, 2017 10:54 pm Post subject: Re: LED Build Journal - Completed Reply with quote

 I  setup  the  plant  grow  LED's  yesterday.  Plants  start  pearling  around  the  usual  time.  The  chips  are  riven  at  600ma  and  i  am  using  20  of  them.  So  the  total  wattage  is  40  watts.  The  light  intensity  seems  less  compared  to  the  Cree  setup.  I  will  observe  this  for  two  weeks.  The  initial  feeling  is  that  i  can  grow  the  plants  with  lesser  light  if  I  am  using  only  plant  grow  LED.  may  be  use  only  15  chips,  about  30  watts.  I  am  still  guessing  at  this  time,  will  post  updates  at  the  end  of  the  month.
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PostPosted: Mon Jun 12, 2017 12:32 pm Post subject: Re: LED Build Journal - Completed and some experiments Reply with quote

 Hi  Preetam
 
   Nice  experiment  going  on  there,  4000  and  8000k  make  really  good  combination  you  will  see  lot  of  difference  for  sure,  i  am  also  planning  to  make  my  2nd  fixture  using  epistar  1w  high  power  led  this  gonna  be  totally  slim  version,  and  regarding  cree  led  from  alixpress  you  sure  its  original  because  when  i  ask  cree  they  are  not  sure  whether  it  original  or  not  and  have  you  checked  mouser  because  they  are  cree  dealer  in  india  below  is  the  link,  but  costly.
 
 http://www.mouser.in/Optoelectronics/LED-Lighting/LED-Emitters/_/N-8usfd/
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PostPosted: Mon Jun 12, 2017 1:46 pm Post subject: Re: LED Build Journal - Completed and some experiments Reply with quote

                                                   
Andrew  wrote  (View  Post):                
Hi  Preetam
 
   Nice  experiment  going  on  there,  4000  and  8000k  make  really  good  combination  you  will  see  lot  of  difference  for  sure,  i  am  also  planning  to  make  my  2nd  fixture  using  epistar  1w  high  power  led  this  gonna  be  totally  slim  version,  and  regarding  cree  led  from  alixpress  you  sure  its  original  because  when  i  ask  cree  they  are  not  sure  whether  it  original  or  not  and  have  you  checked  mouser  because  they  are  cree  dealer  in  india  below  is  the  link,  but  costly.
 
 http://www.mouser.in/Optoelectronics/LED-Lighting/LED-Emitters/_/N-8usfd/                

 
 Even  if  its  an  OEM  or  a  copy,  its  working  well.  Thats  what  matters,  so  far  no  chip  has  failed.
 
 After  looking  at  the  spectrum  ,  I  am  a  little  worried,  since  the  plant  grow  LED  also  show  some  range  in  the  UV  region.  I  did  not  anticipate  this  when  buying,  and  did  more  research  later  on.  400nm  falls  in  the  range  of  the  UV  spectrum,  if  anyone  can  clarify  this  point  i  will  be  happy.  The  side  effect  it  that  it  should  also  kill  algae  spores  and  burn  the  Plant  leaves.  I  will  only  know  after  a  few  days.  I  put  up  some  masking  tape  at  the  top  of  the  tank  to  prevent  any  direct  exposure  to  that  light.
 
 Hopefully  there  is  no  UV  spectrum  in  it.  Is  there  any  way  to  check  it  at  home?
 
 I  am  a  little  worried,  so  i  might  not  use  this  for  a  long  duration.
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PostPosted: Mon Jun 12, 2017 4:14 pm Post subject: Re: LED Build Journal - Completed and some experiments Reply with quote

                                                   
Preeths  wrote  (View  Post):                
                                                 
Andrew  wrote  (View  Post):                
Hi  Preetam
 
   Nice  experiment  going  on  there,  4000  and  8000k  make  really  good  combination  you  will  see  lot  of  difference  for  sure,  i  am  also  planning  to  make  my  2nd  fixture  using  epistar  1w  high  power  led  this  gonna  be  totally  slim  version,  and  regarding  cree  led  from  alixpress  you  sure  its  original  because  when  i  ask  cree  they  are  not  sure  whether  it  original  or  not  and  have  you  checked  mouser  because  they  are  cree  dealer  in  india  below  is  the  link,  but  costly.
 
 http://www.mouser.in/Optoelectronics/LED-Lighting/LED-Emitters/_/N-8usfd/                

 
 Even  if  its  an  OEM  or  a  copy,  its  working  well.  Thats  what  matters,  so  far  no  chip  has  failed.
 
 After  looking  at  the  spectrum  ,  I  am  a  little  worried,  since  the  plant  grow  LED  also  show  some  range  in  the  UV  region.  I  did  not  anticipate  this  when  buying,  and  did  more  research  later  on.  400nm  falls  in  the  range  of  the  UV  spectrum,  if  anyone  can  clarify  this  point  i  will  be  happy.  The  side  effect  it  that  it  should  also  kill  algae  spores  and  burn  the  Plant  leaves.  I  will  only  know  after  a  few  days.  I  put  up  some  masking  tape  at  the  top  of  the  tank  to  prevent  any  direct  exposure  to  that  light.
 
 Hopefully  there  is  no  UV  spectrum  in  it.  Is  there  any  way  to  check  it  at  home?
 
 I  am  a  little  worried,  so  i  might  not  use  this  for  a  long  duration.                

 
 If  your  light  spectrum  starts  from  400nm  then  it's  not  gonna  harm  anything,  and  are  using  full  spectrum  led  totally  or  mixed  with  some  other  leds  like  cool  white  when  i  was  testing  my  led  i  found  just  warm  white  and  cool  white  was  more  than  enough  and  gave  wonderful  result  because  your  warm  white  has  lot  of  red  spectrum  and  cool  white  has  blue  spectrum  and  if  you  really  wanna  check  the  wavelength  of  light  then  you  need  spectrometer  which  will  cost  you  a  bomb  or  do  a  diy  below  is  a  good  video  
 https://www.youtube.com/watch?v=m6zpNSoQTV8
 
 and  below  is  a  article  on  light  spectrum  for  planted  tank  i  used  the  below  guide  to  choose  leds.
 
 http://www.aquaticplantcentral.com/forumapc/lighting/38014-lighting-spectrum-photosythesis.html
 
 and  in  below  article  if  you  see  they  mentioned  from  380nm  so  you  no  need  to  worry
 
 https://sites.google.com/site/natureaquariumclub/home/lighting
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Preeths
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PostPosted: Tue Jun 13, 2017 12:43 pm Post subject: Re: LED Build Journal - Completed and some experiments Reply with quote

 Hi  Andrew,
 
 I  am  not  using  a  mix,  I  am  using  Plant  grow  LED  with  a  spectrum  from  400nm  till  840nm.
 
 I  have  come  to  realize  that  spectrum/  kelvin  rating  is  not  so  important  if  you  have  enough  intensity.  For  most  plants,  after  a  2-4  week  period  they  will  adapt  to  the  available  light.  How  ever  based  on  the  height  of  the  tank,  its  the  more  energetic  photons  that  reach  the  bottom.  So  warm  whites  would  not  be  that  good  for  deep  tanks.  So  for  tanks  with  a  depth  of  12  to  18  inches  anything  will  work,  warm  white,  cool  white,  cold  white  etc.  Even  Incandescent  bulbs  will  grow  plants  in  shallow  tanks....  (i  Used  100W  bulbs  a  long  time  back....  Chuckle
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Andrew
Regular Poster on IAH
Regular Poster on IAH



Joined: Apr 03, 2014
Posts: 392
Location: Coimbatore

Status: Offline
PostPosted: Tue Jun 13, 2017 7:25 pm Post subject: Re: LED Build Journal - Completed and some experiments Reply with quote

 Yep  plant  doesn't  care  about  kelvin,  because  kelvin  just  for  viewing  purpose  and  even  i  have  grown  plants  in  12000k  light  without  any  issues  because  plant  takes  what  it  needs   but  spectrum  will  show  some  difference  in  plant  growth.  as  per  your  concern  about  400nm  like   u  mentioned  it's  good  for  plants  so  no  need  to  worry  and  kelvin  doesn't  play  role  in  intensity  lumens  of  bulb  play  important  role  in  intensity  even  you  can  check  tropica  they  will  measure  the  lumens  mainly  check  the  below  link,  i  have  3000k  and  4000k  39w  t5ho  where  one  4000k  will  dominate  my  tank  even  if  i  have  3  6500k  tubes  with  it,  because  all  the  tubes  i  have  has  same  lumens  and  people  stick  to  5000  -  6500k  bulb  mostly  have  good  spectrum  to  grow  plants,  but  a  6500k  bulb  with  less  lumens  and  CRI  wont  help  that  much  i  have  done  experiments  plant  will  not  grow  like  we  wish.  Once  in  IAH  User  Nidhi  posted  a  url  about  lumens  and  it's  importance  really  a  good  one  not  able  to  find  now.
 
 http://tropica.com/en/guide/make-your-aquarium-a-success/light/
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Preeths
Committed Member of IAH
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Joined: Nov 07, 2007
Posts: 1910
Location: Bangalore

Status: Offline
PostPosted: Wed Jul 12, 2017 4:14 pm Post subject: Re: LED Build Journal - Completed and some experiments Reply with quote

 One  month  Update  On  the  plant  grow  LED's  ....
 
 Compared  to  the  6500K  LED's,   Full  spectrum  LED's  are  growing  the  same  Plants  at  a  lower  wattage.  Algae  on  the  Glass  is  not  there  which  seems  to  be  a  good  thing.  Algae  on  the  plants  has  vanished,  but  i  did  not  see  any  change  for  algae  on  the  hardscape.  IF  you  don't  mind  the  PINKISH  look  and  want  plants  to  grow   well  then  this  will  suffice.
 
 Will  probably  remove  the  plant  grow  lights  this  week  and  replace  it  with  the  6500k  lights.  
 
 Will  try  the  Plant  Grow  LED  on  a  DRY  start  Scape,  the  usual  time  for  dry  start  is  between  4-6  weeks,  will  be  good  if  this  can  be  reduced!!
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