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http://indianaquariumhobbyist.com/community/ :: View topic - comment on this spectral distribution of MH 150/942
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comment on this spectral distribution of MH 150/942
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joyban
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PostPosted: Thu Apr 24, 2008 7:34 pm Post subject: Re: comment on this. Reply with quote

 This  is  the  light  Tarun  is  useing  and  these  are  Ceramic  Metal  H  Lamps  with  high  lumen  output,  I  have  compared  it  with  the  other  Ceramic  Lamp  which  is  WDL  ie  3000K,  which  has  a  different  spectrum  ....see  below:-
 
 
 
 The  4200K  has  better  PAR  &  PUR  ratings  than  the  WDL  at  3000K,  currently  DL  for  Ceramic  MH  is  Not  available  from  Osram.
 
 This  is  comparatively  a  new  technology  than  the  Quartz  MetalH  Lamps  which  is  normally  being  used  for  planted  aquariums.
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Tirtha C
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PostPosted: Thu Apr 24, 2008 7:36 pm Post subject: Re: comment on this spectral distribution of MH 150/942 Reply with quote

 I  never  can  be  so  wrong  Tarun.  I  heard  that  Kelvin  rating  from  you  only.  And  I  stated  the  same  in  my  first  post.  Don't  want  to  start  that  same  old  controversial  arguments  here  again.   Drinking
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fishyman
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PostPosted: Thu Apr 24, 2008 8:00 pm Post subject: Re: comment on this spectral distribution of MH 150/942 Reply with quote

 Hi  Madan,
 good  to  see  you  back  on  Iah.  
 I  bought  a  pair  of  these  lights  for  my  6  footer  which  was  never  made  so  i  have  installed  them  on  my  3x2x2  tank  with  photoperiod  of  4  hours  then  continuing  with  osram  floura  for  another  6  hours.I  am  aware  perhaps  it  is  too  much  light  for  a  3  footer  but  i  am  thinking  of  other  options.
 I  and  sujoy  da(joyban)  searched  for  many  options  and  finally  settled  for  this  one.
 HCI  are  known  for  better  lumen  output  than  HQI  and  spectrum  seemed  to  be  better   and  also  life  is  around  14000  hours  but   price  is  approximately  thrice  the  cost  of  normal  mh.
 HCI  is  only  available  in  3000k  and  4200  kelvin  so  far.
 regards
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PostPosted: Thu Apr 24, 2008 8:59 pm Post subject: Re: comment on this spectral distribution of MH 150/942 Reply with quote

 Tarun,
 
 The  last  time  when  I  used  2  x  150  watt  MH  bulbs  on  a  3  x  2  x  2  feet  planted  tank,  that  particular  tank  went  on  to  get  the  42nd  place  in  ADA  Aquatic  Plant  Layout  Contest  2001.  Very Happy
 
 The  funny  thing  was  one  was  2800  K  WDL  bulb  and  the  other  was  5200  DL  bulb  from  Osram.  I  never  looked  at  the  bulbs  only  the  packages  and  one  of  the  bulbs  was  WDL  and  packaged  wrongly.  Everyone  coming  home  commented  on  the  yellow  looking  bulb  and  half  of  the  tank,  but  I  kept  denying  the  yellow  color.
 I  kept  changing  the  ballast  thinking  that  was  the  problem.  I  only  realised  the  screw  up  when  the  bulb  fused  and  I  had  to  renew  it  after  2  years.  Very Happy
 
 The  plant  growth  was  amazing  simply  awesome.  Trevor  has  posted  a  Pic  of  that  tank  somewhere  on  IAH.
 
 2  x  150  watt  MH  is  not  overkill  on  a  3  x  2  x  2  ,  but  remember  to  keep  your  CO2   ^  UP  THERE  ^,  and  dosing  regular.
 
 It's  like  a  2008  Ferrari  on  NOx.
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PostPosted: Thu Apr 24, 2008 9:08 pm Post subject: Re: comment on this spectral distribution of MH 150/942 Reply with quote

 The  tank  is  here:
 
 
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PostPosted: Thu Apr 24, 2008 9:19 pm Post subject: Re: comment on this spectral distribution of MH 150/942 Reply with quote

 The  Spectrum  Comparative  Between  the  HQI  and  HCI  from  Osram  is  as:-
 
 
 
 Powerstar  HQI-TS-NDL-4200K-150W-Quartz  Technology  Metal  Hallide  -  CRI-  87%-12000lm,  Actual  Watts  =  150W,  lm/W  =  80.00
 Calclulated  PPF(photosynthesis  photon  flux  density)  &  PUR(Photosynthetically  Useful  Radiation)  from  Spectrum  is  as  210.74  &  106.32  micromoles  per  second  per  square  meter.
 
 Blue  (380-510)nm=  33.36%
 Green(510-590)nm=  27.51%
 Red  Near(590-700)nm=  32.51%
 Far  Red(700-780)nm=  6.62%
 
 Powerstar  HQI-TS-D-5200K-150W-Quartz  Technology  Metal  Hallide  -  CRI-  90%-12000lm,  Actual  Watts  =  150W,  lm/W  =  80.00
 Calclulated  PPF(photosynthesis  photon  flux  density)  &  PUR(Photosynthetically  Useful  Radiation)  from  Spectrum  is  as  223.13  &  115.89  micromoles  per  second  per  square  meter.
 
 Blue  (380-510)nm=  36.83%
 Green(510-590)nm=  26.98%
 Red  Near(590-700)nm=  29.12%
 Far  Red(700-780)nm=  7.07%
 
 Powerball  HCI-TS-NDL-4200K-150W-Ceramic  Technology  Metal  Hallide  -  CRI-  97%-14200lm,  Actual  Watts  =  144W,  lm/W  =98.61
 Calclulated  PPF(photosynthesis  photon  flux  density)  &  PUR(Photosynthetically  Useful  Radiation)  from  Spectrum  is  as  258.53  &  125.70  micromoles  per  second  per  square  meter.
 
 Blue  (380-510)nm=  28.64%
 Green(510-590)nm=  27.31%
 Red  Near(590-700)nm=  35.40%
 Far  Red(700-780)nm=  8.66%
 
 Powerball  HCI-TS-WDL-3000K-150W-Ceramic  Technology  Metal  Hallide  -  CRI-  90%-14800lm,  Actual  Watts  =  144W,  lm/W  =102.77
 Calclulated  PPF(photosynthesis  photon  flux  density)  &  PUR(Photosynthetically  Useful  Radiation)  from  Spectrum  is  as  251.40  &  111.88  micromoles  per  second  per  square  meter.
 
 Blue  (380-510)nm=  16.25%
 Green(510-590)nm=  28.12%
 Red  Near(590-700)nm=  46.14%
 Far  Red(700-780)nm=  9.48%
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PostPosted: Thu Apr 24, 2008 9:23 pm Post subject: Re: comment on this spectral distribution of MH 150/942 Reply with quote

 Thanks  Sujoy,
 
 Powerball  is  surely  better  than  Powerstar.
 
 I  currently  have  Astralux  8000K  MH  which  I  got  on  a  mass  order  for  IAH  members  2  years  ago  on  2  of  my  tanks,  and  I  am  happy  with  them.
 
 I'll  think  of  an  upgrade(?)  to  HCI  when  these  bulbs  bite  the  dust.
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