Help with DIY PAR38 reflector

Discussion in 'Anything DIY Related' started by viper357, 29 Aug 2012.

  1. viper357

    viper357 Admin MASA Contributor

    Joined:
    4 May 2007
    Posts:
    28,749
    Likes Received:
    1,012
    Hi all

    I need some help or some idea's on how to make a reflector.

    I have an energy saver bulb that looks something like this...
    1503dd480cc0a8.jpg

    But now I need to make a reflector something similar to the PAR38 bulbs like this...
    1503dd480d3334.jpg

    Any idea's?

    Thanks.
     
  2. Guest




  3. PeterL

    PeterL

    Joined:
    19 Mar 2010
    Posts:
    1,107
    Likes Received:
    7
    Location:
    East Rand
    Right off the cuff, why not buy the spot just like that? They make energy saver spots just as you describing.

    The DIY idea that comes to mind is you need 100% smooth, try an oversize spot like your 2nd pic (buy one off from hardware store) and cut it very gently with a dremmel to make the housing, cut the back off so your globe can poke out the bottom for wiring, and slice the top rim where the feflective meets the clear glass to make a "lid". Remove the internals to leave you with an empty shell to fit your top energy saver globe. It takes no heat so you could use silicone to make a rubber "gasket" around the rim so that you can pull it back together without allowing moisture in. You then have a glass housing and as good reflectiveness as you will ever get it.
     
  4. OP
    viper357

    viper357 Admin MASA Contributor

    Joined:
    4 May 2007
    Posts:
    28,749
    Likes Received:
    1,012
    Thanks Peter.
    Unfortunately they don't make the wattage and Kelvin rating I want in the spots.

    Will a dremel cut through that glass? It's so thin I would think it would shatter.
     
  5. Toolboysa

    Toolboysa Moderator

    Joined:
    30 Nov 2010
    Posts:
    2,277
    Likes Received:
    141
    Location:
    Wilgeheuwel
    Take tin foil and make a cone :rofl::rofl::rofl:
     
  6. rakabos

    rakabos

    Joined:
    12 Jul 2010
    Posts:
    5,012
    Likes Received:
    91
    Location:
    Wilgeheuwel, JHB
    Remember white is a good reflector. You get all sorts of white pipes etc at builders that could work
     
  7. Toolboysa

    Toolboysa Moderator

    Joined:
    30 Nov 2010
    Posts:
    2,277
    Likes Received:
    141
    Location:
    Wilgeheuwel
  8. PeterL

    PeterL

    Joined:
    19 Mar 2010
    Posts:
    1,107
    Likes Received:
    7
    Location:
    East Rand
    @ Toolboysa, tin foil "bursts" the light all over the place because of the creases, it needs to be as smooth as possible to reflect maximum.

    @viper357 - Considering you will be making a reflector out of it, and to fit another globe inside, it will need to be a fair size globe to start with and they have fairly thick glass (take those motion detection spot lights people use on their houses per example, that is fairly thick glass and those arent terribly big spots), the small ones I would also think to be thin and possibly shatter.

    I am not sure of your space constraints but you get what looks like a flood light which houses the fitting for a regular globe instead of the old halogen globes, it is an already made fitting.
     
  9. Toolboysa

    Toolboysa Moderator

    Joined:
    30 Nov 2010
    Posts:
    2,277
    Likes Received:
    141
    Location:
    Wilgeheuwel
    Hence the rolling smilies
     
  10. butcherman

    butcherman Moderator

    Joined:
    7 Sep 2009
    Posts:
    11,685
    Likes Received:
    290
    Location:
    Kempton Park
    got a picture or a link to the actual globe?
     
  11. RiaanP

    RiaanP Moderator

    Joined:
    11 Aug 2008
    Posts:
    24,028
    Likes Received:
    1,455
    Location:
    Centurion
    if you can get alanod, then go to the Vet.
    Get one of those small cat or dog collar. Use it as a template and first cut one reflector on a piece of stiff paper. Confirm if it is the right fit. Then cut the rest out of your alanod.

    If you cannot get alanod, then stiff white plastic or even temporary cardboard would also work.

    White surface reflects more than aluminium foil anyway.
     
  12. OP
    viper357

    viper357 Admin MASA Contributor

    Joined:
    4 May 2007
    Posts:
    28,749
    Likes Received:
    1,012
    Don't you just hate how America has everything, I mean they literally have anything and everything you could ever think of. :(
    It's just the standard energy saver type.
    That's given me an idea, wonder if I can find a big enough white funnel, like the ones we use in the kitchen. Or even one of those black ones for petrol and then just paint the inside white, that should work?
     
  13. RiaanP

    RiaanP Moderator

    Joined:
    11 Aug 2008
    Posts:
    24,028
    Likes Received:
    1,455
    Location:
    Centurion
    It should, not sure how hot the base gets and with plastic permanently in contact? Unless you can mount it so that funnel is mounted on the ceramic holder.
     
  14. rakabos

    rakabos

    Joined:
    12 Jul 2010
    Posts:
    5,012
    Likes Received:
    91
    Location:
    Wilgeheuwel, JHB
    Oil funnel is what u looking for.

    8820960-funnel-isolated-on-white-background.jpg
     
  15. OP
    viper357

    viper357 Admin MASA Contributor

    Joined:
    4 May 2007
    Posts:
    28,749
    Likes Received:
    1,012
    Yeah, I'm sure I can make a plan with one of those, will see what I can come up with, thanks.
     
  16. Toolboysa

    Toolboysa Moderator

    Joined:
    30 Nov 2010
    Posts:
    2,277
    Likes Received:
    141
    Location:
    Wilgeheuwel
    Not only that but the $55 shipping for a item that cost $5 and of course you'll only ever need one in your entire life and your friends dont want one either
     

Recent Posts

Loading...
Similar Threads - Help PAR38 reflector Forum Date
Sump Designs HELP/INPUT General Discussions and Advice Today at 06:35
RSM Cabinet "Disassembly" - HELP needed RSM Red Sea Max tanks Tuesday at 17:47
Dosing Help Water Parameters and Additives 12 Jul 2017
Help: Black foam on Red Sea Cabinets or similar General Discussions and Advice 12 Jul 2017
Help guys grass looking algae Nuisance Algae 11 Jul 2017
Help- scratch on new tank Anything DIY Related 9 Jul 2017
Help a young reefer save money General Discussions and Advice 6 Jul 2017