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http://indianaquariumhobbyist.com/community/ :: View topic - LED Flood lamps: A 'Cool' or 'Hot' Choice?
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LED Flood lamps: A 'Cool' or 'Hot' Choice?

 
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viv88
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PostPosted: Sat May 26, 2012 1:49 am Post subject: LED Flood lamps: A 'Cool' or 'Hot' Choice? Reply with quote

 Hi  friends  Smile  
 Need  some  technical  help  with  Led  flood  lamps.  Help  
 How  efficient  are  LED  flood  lamps(FL)  as  compared  to  Fluorescent  lamps?
 I  am  planning  to  use  10Wx3  LED  flood  lamps  to  replace  36Wx2PLLs,as  led  consumes  less  power,(and  i  thought  they  produce  less  heat!i  was  wrong  Drinking  ).
 The  LED  FL  becomes  too  hot  after  working  for  hours  together.Even  though  it  has  its  own  heat  sink,it  becomes  hot  to  touch.
 If  i  am  not  wrong  at  high  temperatures  resistance  increases,  Now  the  question  is  wont  this  force  the  setup  to  consume  more  current,  decreasing  efficiency?
 Are  cooling  fans  necessary  to  cool  down  the  heat  sink  in  a  LED  FL?
 
 Comments,Suggestions,  Criticisms  welcome.  Thumb Up   
 
 Thank  You
 Vivek.K
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yadnesh
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PostPosted: Sat May 26, 2012 1:33 pm Post subject: Re: LED Flood lamps: A 'Cool' or 'Hot' Choice? Reply with quote

 My  suggestion  would  be  go  for  2  nos  of  30  watt  rather  than  3  x  10  watt  &  always  but  indian  fittings.   currently  i  am  using  1x  30  watt  fld  lght  for  4  ft  tank  &  seems  to  be  enough  as  plants  r  growing  well  without  co2  injct  &  algae  growth.   As  per  my   exp  fld  light  choke  gets  hot  little  bit  but  not  so  much  tht  u  cant  touch.  no  fan  n  all  required  u  can  mount  it  on  back  wall  of  tank  &  keep  it  open  without  hood.  I  have  done  d  same  &  this  way  u  can  also  look  in  to  in  your  tank  from  top.
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chvvkumar
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PostPosted: Sat May 26, 2012 2:47 pm Post subject: Re: LED Flood lamps: A 'Cool' or 'Hot' Choice? Reply with quote

                                                   
viv88  wrote  (View  Post):                
Hi  friends  Smile  
 Need  some  technical  help  with  Led  flood  lamps.  Help  
 How  efficient  are  LED  flood  lamps(FL)  as  compared  to  Fluorescent  lamps?
 I  am  planning  to  use  10Wx3  LED  flood  lamps  to  replace  36Wx2PLLs,as  led  consumes  less  power,(and  i  thought  they  produce  less  heat!i  was  wrong  Drinking  ).
 The  LED  FL  becomes  too  hot  after  working  for  hours  together.Even  though  it  has  its  own  heat  sink,it  becomes  hot  to  touch.
 If  i  am  not  wrong  at  high  temperatures  resistance  increases,  Now  the  question  is  wont  this  force  the  setup  to  consume  more  current,  decreasing  efficiency?
 Are  cooling  fans  necessary  to  cool  down  the  heat  sink  in  a  LED  FL?
 
 Comments,Suggestions,  Criticisms  welcome.  Thumb Up   
 
 Thank  You
 Vivek.K                

 
 Hey,  
 
 As  Yadnesh  said,  you  don't  need  additional  cooling  for  the  flood  light  type  LED  lamps.  The  built  in  heat  sink  is  enough.
 
 I  am  using  one  as  my  garage  light  and  even  after  being  turned  on  all  night,  the  heat  sink  only  gets  moderately  warm.  Not  too  hot  to  touch.  
 
 If  your  aquarium  canopy  (or  DIY  light  stand)  could  accommodate  it,  then  3*10W  would  give  you  three  levels  of  light  control  (low  =  1,  medium  =  1+1,  high  =  1+1+1)  and  might  be  even  cheaper  than  1*30W  light.  Where  I  live,  10W  is  5xx  and  20W  is  more  than  1xxx  bucks.
 
 Also,  depending  on  what  height  you  want  to  place  the  lamp,  3  lights  would  have  better  spread  (that  was  the  case  with  my  15g  2  feet  aquarium).
 
 Finally,  I  don't  think  the  temperatures  at  which  these  LEDs  operate  (especially  with  heat-sinks)  would  be  that  detrimental  to  the  operating  efficiency.  While  it  is  true  that  conductivity  decreases  with  temperature  under  normal  operating  temperatures,  this  shouldn't  have  too  much  of  an  effect.
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viv88
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PostPosted: Sun May 27, 2012 3:07 am Post subject: Re: LED Flood lamps: A 'Cool' or 'Hot' Choice? Reply with quote

 Thanks  you  yadnesh  &  chvvkumar,  Thumb Up
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nanomania
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PostPosted: Sun May 27, 2012 9:59 am Post subject: Re: LED Flood lamps: A 'Cool' or 'Hot' Choice? Reply with quote

 I  have  been  using  led  floods  on  marine  and  planted  with  great  success.  &  YES  you  do  need  to  kool  the  lights  using  fans  on  the  light.  the  reason  is  that  they  will  last  much  more,  as  they  do  generate  heat  on  the  body...   i  use  pride  brand  and  not  chineese  as  they  come  with  1  year  warantee  and  my  cousin  is  a  dealer  here  in  mumbai.  the  blues  are  chineese.
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viv88
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PostPosted: Sun May 27, 2012 11:13 pm Post subject: Re: LED Flood lamps: A 'Cool' or 'Hot' Choice? Reply with quote

 Thank  you  nanomania....This  is  what  i  was  looking  for,
 i  have  fixed  the  cooling  fan,it  does  cool  the  unit,the  lamp  remains  cool...only  annoying  thing  is  the  low  noise  made  by  the  fans,
 
 thank  you   Thumb Up  
 Vivek
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royalbijoy
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PostPosted: Wed Jun 27, 2012 4:51 pm Post subject: Re: LED Flood lamps: A 'Cool' or 'Hot' Choice? Reply with quote

 Repetition....
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