Reflector options

Discussion in 'Lighting' started by Fishy Steve, 6 May 2009.

  1. Fishy Steve

    Fishy Steve Hiden super user

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    It makes me feel dumb for asking but why don't we use an actual mirror for a reflector? Surely if we want 100 percent reflection thats the way to go?
     
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  3. Falcon

    Falcon

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    well mirrors around tanks as in most tanks with mirrors seem to rust away and get tarnished,i'm sure a reef will corrode it quicker.
    and secondly most people like concave reflectors to deflect the light mainly to a certain angle thereby capturing most of the light directly into the tank...

    well thats my thoughts on it anyway,i could be wrong why dont you try it as mirrors are easily obtainable....
     
  4. Warr7207

    Warr7207

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    What is the difference to running a "big" reflector like this:

    [​IMG]

    Compared to running a pendant type ?

    [​IMG]
     
  5. riyadhessa

    riyadhessa

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    Im tagging along
     
  6. Junz

    Junz

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    Mirrors dont make for good reflectors, you will have a lower PAR output as the light must first go through the glass twice before entering into your tank....
     
  7. Junz

    Junz

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    first enter the glass and then gets reflected out through by the mirror, this lowers the PAR and i think the PUR as well

    get yourself some decent reflectors from your LFS ...and try to stay away from big sheet type reflectors coz you loose alot of light from them as well...

    individual reflectors are the best
     
  8. Nemos Janitor

    Nemos Janitor

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    :) OK so now i want to make my own reflectors for my T5's. What material do i use and how do i make them?:whistling:
     
  9. ziyaadb

    ziyaadb

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    If you can get alonod there is a thread somewhere or do a google search to find it, u can easily bend it to your required shape. u buy it in sheets
     
  10. Kavir

    Kavir

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    I got mirror on 5 t5s and 2 t8s & trust me it's doesn't help me much i got 2 t5s on a aluminium reflector and that works like a bomb.
    My uncle got a glass factory in rustenberg and i paid 4k for a 2m x 1m x 500mm tank wit 850mm x 500mm x 500mm sump and stand So i really shouldn't complain
     
  11. Reef Maniac

    Reef Maniac MASA Contributor

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    Find someone who installs skylights - the line the "hole" with a very thin, highly polished metal mirror (aluminium, I think...). This works *very* well, is highly reflective and can be easily fabricated into whatever shape you like.

    Hennie
     
  12. Travis1

    Travis1 (wilsontravy)

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    any ideas where i could get the material from 2 make reflectors in durban?
     
  13. Warr7207

    Warr7207

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    Still would like to know the difference between the really big MH reflectors and the pendant type ?
     
  14. Reef Maniac

    Reef Maniac MASA Contributor

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    They are more expensive :whistling:

    Seriously, I don't really understand the question - do you mean the larger luminairs (lighting unit) or only larger reflectors inside a luminair?

    The larger luminairs are probably built that way for specific applications, such as petrol filling station "low bays", where the requirement is more for a broadly illuminating flood light than a spot light effect only illuminating a small area...

    Hennie
     
  15. Warr7207

    Warr7207

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    I originally had a pic of the larger reflector, not sure where it went.

    [​IMG]

    Why use these rather than the pendant type reflector ?
     
  16. RiaanP

    RiaanP Moderator

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    Warr, where can I get that?
    Or if you not allowed to tell me, please PM me.
     
  17. Warr7207

    Warr7207

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    I have no idea, but my factory guys can make them, and I want to know if it is worth it.
     
  18. lIghty

    lIghty

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  19. RiaanP

    RiaanP Moderator

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    Warr, yes, I'm interested.
    What wattage globes will that be? For me 250w

    what will be the estimated cost? So it is just the reflector and a socket.
     
  20. Warr7207

    Warr7207

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    I would go with 250w.

    It looks like the reflector will cost around R400.00 excluding the fittings.

    But the question still is, is there a benefit to these large reflectors compared to the pendant types ?
     
  21. RiaanP

    RiaanP Moderator

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    I wondered about that, seeing a T5 MH Combo unit. Those units MH unit is so small
    Why? are those bulbs only 70W?
    In the one you can build, the inside looks just big enough to house the globe. What is the physical measurements? Your reflector looks for me in relationship to the bulb about right. Unless there is one BIG globe in there.

    In conclusion, I think it got to do with the actual bulb size. So please check for a reasonally prized 250W MH globe and design the reflector around that. Instead of a bulb that only one importer have at crazy price.
     
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