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http://indianaquariumhobbyist.com/community/ :: View topic - reflector material- suggestions
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reflector material- suggestions
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sudhirvr
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PostPosted: Tue May 09, 2006 11:50 am Post subject:  Reply with quote

 Hi  vkv
 
 Just  caught  on  to  this  thread.  I  too  am  a  DIY  buff.
 
 IMO  if  you  can  visit  any  Philips  Dealer,  you  can  get  the  tubelight  fittings  that  are  commonly  used  in  offices  -  fixed  in  to  the  false  ceiling.  I  think  2  of  these  having  2  trulite  tubes  each  will  fit  your  requirement  of  size  as  well  as  light  output.  If  you  carry  out  a  little  bit  of  modification  using  some  aluminium  angles,  you  can  convert  this  to  the  sliding  arrangement  too  with  this.
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vkv
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PostPosted: Tue May 09, 2006 11:57 am Post subject:  Reply with quote

 Thanks  Sudhir,
 
 will  check  in  at  the  Philips  dealers.  I'm  still  not  sure  about  being  able  to  fit  2  fittings  over  my  tank  as  I  have  very  limited  headroom  and  just  about  16  inches  of  width  Sad
 
 Maybe  I  could  scavenge  parts  from  the  fittings.  However,  I  believe  the  fittings  are  very  expensive.  Lets  see  what  the  dealer  says...  Will  update  once  I  get  the  info...
 
 Regards,
 Venkat
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Deepak_Brid
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PostPosted: Tue May 09, 2006 5:35 pm Post subject:  Reply with quote

                                                   
rahulk  wrote:                
I  guess  metal  foil  would  be  good  enough  as  a  reflector,  foils  which  are  used  to  package  food  .                

 
 
                                                 
vkv  wrote:                
I  was  wondering  if  the  aluminium  foil  will  not  degrade  over  time  with  the  heat  and  humidity?
 
 Have  you  personally  seen  it  being  used  or  used  it  yourself.  What  are  the  results  over  time?  I  want  something  that  is  pretty  low/non-maintenance...
 
 I  hope  to  get  away  with  lower  wattage  by  using  a  good  reflector.
 
 Is  a  glass  mirror  any  good  or  will  it  just  cause  restrike  since  it  will  be  flat  and  not  formed  to  a  good  reflecting  profile?                

 
 Hi  Venkat,
 In  closed  canopies  the  foil  will  degrade  over  time  &  disintegrates.
 Comparatively,  in  open  canopies  too  it  will  degrade  but  the  duration  will  be  longer.
 
 IMO,  reflectors  increase  efficiency  of  lamps  by  up  to  ~40  percent  when  used  properly.  You  can't  get  away  entirely  by  using  a  reflector  &  doubling  the  output  by  just  using  a  well  designed  reflector.
 
 The  Reflector  aids  in  proper  diffusion  of  light  &  concentrating  or  keeping  it  confined  over  a  given  area.
 
 E.g.  Light  Diffusion  of  a  20W  CFL  (6"long)  will  be  different  than  a  Fluorescent  lamp  (24"  long)  of  the  same  wattage.  The  reflector  will  enhance  the  lamps  efficiency  in  both  cases,  depending  on  the  design.
 
 You  could  try  Acrylic  too,  but  it's  a  bit  heavier  &  tends  to  scratch  of  too  easily,  not  forgetting  that  even  the  â€˜glossy’  metallic  reflector  is  prone  to  scratches  &  can  loose  its  reflective  properties  if  not  handled  with  care.  Acrylic  may  warp  over  time  &  if  it’s  not  thick  enough.  I’ve  seen  in  one  canopy  so  far,  but  not  enough  to  say  if  it  would  warp  or  not..  But  scratches  on  the  reflector  are  already  visible.  This  is  a  closed  Canopy  &  I’m  not  sure  how  acrylic  will  react  to  salt  deposits,  in  terms  of  cleaning  required  over  time….it’s  going  to  be  a  tough  job!
 
 Paint  too  is  a  cheap  &  â€˜okay’  option.
 
 Regards,
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vkv
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PostPosted: Tue May 09, 2006 6:07 pm Post subject:  Reply with quote

 Hi  Deepak,
 
 Thanks  for  you  inputs  on  Acrylic...  Foil  seems  a  definite  no-go.
 
 I'm  trying  to  obtain  some  mirror  finished  aluminium  that  I  can  form  into  a  good  reflecting  profile.
 
 Are  you  aware  if  mirror  polished  aluminium  sheets  are  available  in  the  market  and  what  sort  of  expense  will  it  entail?
 
 I'm  planning  individual  reflectors  for  each  tube  formed/shaped  to  direct  maximum  light  downward.
 
 Do  let  me  know...
 
 Regards,
 Venkat
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Deepak_Brid
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PostPosted: Tue May 09, 2006 6:41 pm Post subject:  Reply with quote

 Hello  Venkat,
 
 I  can  fabricate  as  per  your  requirement.  I’ve  also  sent  you  a  PM.
 
 Regards,
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Perikaruppan
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PostPosted: Fri Sep 15, 2006 8:31 pm Post subject: Re: reflector material- suggestions Reply with quote

 Hey  guys,  even  i  was  searching  for  a  reflector  that  is  least  expensive  and  found  one.  
 
 If  you  can  locate  one  of  the  Vinyl/flex  sticker  places  (there  are  a  few  in  chennai  near  mount  road),  they  have  these  refective  stickers...  
 
 I  use  these  refective  stickers  for  my  discus  tanks  (cost  abt  8Rs/Sft)  and  they  are  good...
 
 and  now  i  got  the  refective  stickers  (SS  finish)  @  12rs/Sft  and  stuck  them  on  all  sides  of  the  canopy...  and  seem  to  be  having  more  light  in  my  tank...
 
 I  think  this  will  be  the  most  economical  way,  but  not  the  most  efficient  but  might  be  efficent  method  which  is  economical  too.
 
 Regards
 Pk
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vkv
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PostPosted: Wed Jan 03, 2007 6:09 pm Post subject: Re: reflector material- suggestions Reply with quote

 Just  bumping  the  thread  as  I  still  haven't  located  a  source  for  mirror  polished  aluminium  sheet.
 Anybody  with  information  on  availability/prices,  do  let  me  know...
 
 Thanks,
 Venkat
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harshal
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PostPosted: Wed Jan 03, 2007 6:47 pm Post subject: Re: reflector material- suggestions Reply with quote

 Hi  Venkat!!
 
    Happy  new  year!!  Well  the  cost  is  very  dependent  on  the  company  that  has  manufactured  it  can  cost  anywhere  from  200-350/  sq  ft.  Whats  the  size  you  looking  for,  let  meknow  I  might  be  able  to  help!  This  is  ofcourse  a  parabolic  aluminium  mirror  reflective  sheet.This  is  what  they  use  for  the  commercially  availble  fittings.
 
      Regards
         Harshal.
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vkv
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PostPosted: Wed Jan 03, 2007 6:53 pm Post subject: Re: reflector material- suggestions Reply with quote

 Hi  Harshal,  
 
 Happy  new  Year  to  you  too  !!!
 
 I'm  planning  4  strips  of  4  feet  x  4  inches,  so  about  4'x  1.5'
 
 I  plan  to  get  the  polished  sheet  and  form  it  myself  into  individual  reflectors  for  the  tubes.
 
 Any  help  appreciated.
 
 Regards,
 Venkat
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harshal
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PostPosted: Thu Jan 04, 2007 10:38 am Post subject: Re: reflector material- suggestions Reply with quote

 Hi  venkat  
      just  posting  pics  of  the  fitting  where  I  have  used  aluminium  foil,used  to  wrap  food,  as  reflective  sheet.Its  about  6  months  old.Also  of  the  Mirror  reflective  sheet.  The  pink  sheet  is  the  protective  covering  I  was  talking  abt  when  we  spoke.
 
      Regards
         Harshal.
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tatiana
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PostPosted: Tue Apr 10, 2007 4:10 pm Post subject: Re: reflector material- suggestions Reply with quote

 has  anyone  ever  thought  of  using  Stainless  Steel  (304  or  316)?  These  types  are  corrosion  free,  etc.
 
 btw  harsha,  where  did  u  locate  a  dealer  for  aluminium  reflective  sheet?
 
 also  commercial  grade  aluminium  foil  is  also  available  here  as  i've  seen  it  being  used  in  makeshifts  by  architects  in  india.
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vyastk
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PostPosted: Tue Apr 10, 2007 4:27 pm Post subject: Re: reflector material- suggestions Reply with quote

 Hi,  
 
 Why  dont  u  try  the  reflector  Stickers  that  are  available  at  automobile  stickering  Shops?.  They  can  be  pasted  to  almost  any  surface
 
 Just  a  thought.......
 
 Regards
 
 Vyas  T  K
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PostPosted: Tue Apr 10, 2007 4:37 pm Post subject: Re: reflector material- suggestions Reply with quote

 @Tatiana
 Forming  stainless  steel  to  a  reflector  shape  may  be  a  problem.  Aluminium  reflector  sheet  is  easily  bendable  even  by  hand.  Since  it  is  DIY  -  use  of  machines  is  ruled  out  unless  you  have  a  workshop  of  your  own  Smile
 Also  -what  is  "commercial  grade  aluminum  foil"?   How  is  it  different  from  the  normal  foil  used  for  wrapping  food?
 
 @vyastk
 I'm  not  sure  of  the  durability  of  the  reflector  stickers  since  they  will  be  vinyl  and  the  heat  in  the  canopy  may  cause  them  to  come  loose  and  lose  their  reflectivity  soon.
 
 Regards,
 Venkat
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tatiana
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PostPosted: Tue Apr 10, 2007 4:57 pm Post subject: Re: reflector material- suggestions Reply with quote

 from  what  i  noticed,  they  are  quite  reflective,  only  difference  from  household  foil  is  that  this  is  thicker.  They  brought  a  whole  large  6'  high  roll  of  the  thing  during  the  interiors  of  our  building.  
 
 U  must  try  asking  any  decent  dealer  for  more  info  on  it.
 
 all  the  best.
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PostPosted: Tue Apr 10, 2007 5:02 pm Post subject: Re: reflector material- suggestions Reply with quote

 Thanks  for  the  info...  I'll  check  it  out...
 
 Regards,
 Venkat
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