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Thread: Lighting upgrade question

  1. #9
    RL7836's Avatar
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    Quote Originally Posted by Av8tor1 View Post
    His fixture has good reflectors...
    (same brand I use)
    To which of the above posters (& reflectors) does this comment refer?
    Last edited by RL7836; 12-13-2011 at 05:06 PM.
    All the best,
    Ron
    You must do the thing you think you cannot do. --- Eleanor Roosevelt

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  2. #10
    Av8tor1's Avatar
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    Talking about what V is currently using Ron

    heheheheh I see you edited your reply old friend

    FWIW , a reflector shape similarr to the McDonald's double arch would be the most efficient design IMHO. Makes perfect sense if you think about it. It would allow you to direct the light from the back side of the bulb. Whereas most any other design would direct some of this light back onto the bulb itself.

    The fixtures I like use faceting in an attempt to reduce this inefficiency. Most true parabolic shapes are designed to focus the energy of a source that is outside of the parabola

    but then me dunno
    Last edited by Av8tor1; 12-13-2011 at 05:21 PM.

  3. #11
    RL7836's Avatar
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    V,
    I'd be a bit suspicious of the efficiency of the 200 watt CFLs because their design loses a large amount of light to obstructions.
    Quote Originally Posted by 31drew31 View Post
    I should have added I install these reflectors on my Sunblasters.
    Are the reflectors
    - parabolic?
    - true mirror reflectors?

    The fixtures themselves look very similar to my 1st set of T-5's (I think they are Sun Blaze). The reflectors that are available for these fixtures are a poor attempt to do an add-on reflector (& they are definitely not mirrors). The reflectors pictured for the Sun Blaster is a different design but doesn't appear to be parabolic - just semi-circular ...

    The Sun Blaster 4-page PDF on Nano technology fails to explain how they even incorporated Nano technology into their reflector (unless I missed it??). However, my BS indicator pegged when I read the following on their reflectors:
    Made possible only through the application of Nanotechnology, this revolutionary reflective surface has the ability to capture lost light, and simultaneously convert that light into the brightest, most brilliant light we have ever produced! The metallic crystal layer within the reflective surface helps spread the T5 light across the plant canopy diffusing it deep into the plant foliage.
    Capturing "lost light" & converting it? Please .... (sounds like they outsourced their pamphlet-writing to the Superthrive folks ...)

    *** My apologies in advance for the excessive sarcasm. The lights may indeed be a good value for the money - but I was less-than-impressed with their attempt-to-be scientific and their similarity to my 1st units (which are ok but far from optimum). ***

    Quote Originally Posted by Av8tor1 View Post
    Talking about what V is currently using Ron

    FWIW , the shape of the McDonald arch would be the most efficient design. Makes perfect sense if you think about it. It would allow you to direct the light from the back side of the bulb. Whereas most any other design would direct some of this light back onto the bulb itself.

    The fixtures I like use faceting in an attempt to reduce this inefficiency,
    All the reflectors I've seen use facets vs an actual curve (although they vary in how many). My 2nd set of T-5 fixtures use the "McDonald arch" you mentioned with true mirror reflectors. The downside (or possibly upside depending on your view) is that they only supply the reflectors, ballast & assorted hardware -- so I had to build the remainder of the 'fixture'. So far, I'm quite happy with them as I can easily add tubes and change spacing as my needs change...
    Quote Originally Posted by Av8tor1 View Post
    heheheheh I see you edited your reply old friend
    More than once ...

    Quote Originally Posted by Av8tor1 View Post
    The fixtures I like use faceting in an attempt to reduce this inefficiency. Most true parabolic shapes are designed to focus the energy of a source that is outside of the parabola
    Outside .... Hmmm - must ponder this ....
    All the best,
    Ron
    You must do the thing you think you cannot do. --- Eleanor Roosevelt

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  4. #12
    Av8tor1's Avatar
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    Quote Originally Posted by RL7836 View Post
    More than once ...
    me too LOL
    Last edited by Av8tor1; 12-13-2011 at 05:48 PM.

  5. #13
    Carnivorous plant enthusiast vraev's Avatar
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    thanks for all the replies guys. here is the fixture I currently use: http://www.contractorlighting.com/hi...277-p-152.html
    If you have a look at the page, you can see the reflector in one of the pics.its a big single piece of metal that has been folded into wedges for each tube to maximize reflectivity without wasting light output reflecting back onto nearby tubes.

    yeah... I read about the sun blaster reflector and fixtures...but there are reasons I don't like them:
    1) Expensive...each reflector is 25$. Each single tube fixture is 36$. Totally unreasonably expensive.
    2) Their nano crystal coated reflector diagram is precisely a diagram and their data of optimal reflectivity has no raw measurements of lumen output when compared to the standard reflector. I agree that it is just bull crap.

    Hey B...I know u were suggesting to get a second T5 4 tube, but that would be sealing the top of my tank mate and it would cook the plants inside. Also..there isn't room to get a second one on top there. The fixture alone is almost 2' wide. The 6 tube T5 is also still about the same size and should be fine.,...but there is no way I can fit a second 4 tube on there.

    Thanks for the suggestions Ron...yeah...Butch told me that the 200watt CFL due to being coiled looses a bit of light by lighting parts of its own bulb instead of shooting it all down in the direction you want it to go. The issue is that there is an overlap zone of the TWO tanks which are side by side and their metal mesh on top has a 5" or so area where the light is absolutely wasted as the metal blocks all light from falling anywhere on the plants. The pro with a CFL would be spot lighting and avoiding the edge area of the tank where this metal railing exists.

  6. #14
    Av8tor1's Avatar
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    v,

    You have struggled with this decision for over a year old friend.... and I dont think you are any closer to a decision


  7. #15
    mobile's Avatar
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    Personally, I would go with T5s in a fitting which has shiny silver curved (parabolic'ish) reflectors. The reflectors won't be absolutely perfect but would be considerably better than none at all. Butch is correct, in regards to spiral CFL inefficiencies.

  8. #16
    Carnivorous plant enthusiast vraev's Avatar
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    Hmm....the more I think about it, perhaps stepping up to a 8tube fixture is the only way to get a nice noticeable increase in colour.

    UPDATE: Minimum quantity for the T5 8 bulb is 5. http://www.contractorlighting.com/hi...77-p-1397.html

    So I guess I can only go up to 6.
    Last edited by vraev; 12-15-2011 at 12:12 AM.

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