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Thread: Today I learned the value of a good reflector Reply to Thread
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Topic Review (Newest First)
04-02-2003 01:17 AM
jart so, i decided on getting some reflector material today. i went to a sheet metal place and got two thirty eight inch long pieces of aluminum (4 inches wide) bent at thirty degree angles (in 2 places) for a grand total of $4.60.

decided on the 2 x 30 degree angle configuration by going to the ahsupply website and crudely measuring the angles on one of their reflector diagrams. of course, i'll never really know if these reflectors are actually working, but i guess it's worth a try. plus, once i get the hood all assembled, i'd be less inclined to add any extra features. might as well do it now.
03-27-2003 02:44 AM
anonapersona window tint!

where did I read that? Can't recall....

anona, pretty dim this evening
03-27-2003 01:19 AM
jart well, gulf et al, i have found a sheet metal shop that is willing to do some cutting and bending on a small scale.

to keep things simple, i think i'll just go with a couple of pieces of metal, and cover them with aluminum tape.

plan: metal - bulb - bulb - bulb - metal (i tried to illustrate this better using /'s and \'s and |'s and the like but it wouldn't turn out. hopefully this is making sense).

if any of you care to comment as to what angles (maybe just a simple 45 degree?) would be perferred i'd be very grateful. thanks for any opinions.
03-19-2003 02:29 PM
GulfCoastAquarian
Quote:
Originally Posted by STAT 007
Quote:
Originally Posted by GulfCoastAquarian
I'll tell you this much, AHSupply's Miro-4 does NOT reflect 99.4% of emitted light into the tank!

UGH!!! What a rook! Kim, you're busted!

Just kidding. It kinda bothers me that this claim of theirs is false, but I've been SUPER happy with the products and service I've received from AH Supply so I'll let this one slide.
Well I amend my statement, I double checked and it is Miro-4 that has the 99% reflectivity claim, not ahsupply. Kim, you're all good! It is the material that is 99% reflective, which does play a huge role in the quality of a reflector. If the aluminum flashing you buy to make your own reflector does only reflect 86% as AHsupply indicated (seems plausible) then even with optimized reflection angles, you still might not be as efficient as if you used enhanced polished aluminum.

I'm not looking to beat AHSupply's performance, only match it for a lower price. Something I could make for $5 (for a 10" by 10 foot roll) and have a decent reflector on all of my tanks.

But I repeat - AHSupply's reflector is excellent. Their claim is not false, as far as I know.
03-19-2003 02:18 PM
STAT 007
Quote:
Originally Posted by GulfCoastAquarian
I'll tell you this much, AHSupply's Miro-4 does NOT reflect 99.4% of emitted light into the tank!

UGH!!! What a rook! Kim, you're busted!

Just kidding. It kinda bothers me that this claim of theirs is false, but I've been SUPER happy with the products and service I've received from AH Supply so I'll let this one slide.
03-19-2003 02:00 PM
GulfCoastAquarian Haha, I just completely laughed out loud after reading this thread just now.

That design program I'm using is Unigraphics NX. I'm just manipulating input angles, radiating from the center of the bulbs. The lines are constrained such that index of reflection = index of refraction and I can follow the reflected light into the tank. There is a lot of re-strike with two bulbs in one reflector. I was thinking of scrapping this idea and making just single bulb reflectors. Reflectivity would increase drastically. I'll tell you this much, AHSupply's Miro-4 does NOT reflect 99.4% of emitted light into the tank!
03-19-2003 10:46 AM
Buck :arrow: Sam For President

03-19-2003 05:47 AM
STAT 007
Quote:
Originally Posted by jart
gulf what computer program are you using?

looks like a prototype of r2d2's noggin. :P

LMAO!!!
03-19-2003 02:26 AM
jart gulf what computer program are you using?

looks like a prototype of r2d2's noggin. :P
03-18-2003 10:07 PM
Work In Progress Oh Sam,
your giving me visions of my nightmarish math class in highschool...
Your diagram looks sharp, yet very complicated, LOL! Good work!

Kelly
03-18-2003 07:31 PM
STAT 007 Leave it to an ME to do something like this... LOL. Good work, GCA!
03-18-2003 02:01 PM
GulfCoastAquarian Jart, I'm actually working on my own reflector design. I started with the Miro-4 reflector that AHSupply uses and optimized it for two T12 tubes, spaced 2 1/2" apart. I'm working on optimizing the reflection angles to get the most output. I could publish a template at that point, and you could use aluminum flashing to bend your own reflector. It's going to take me a while to get it optimized, though, since work has been busy lately.
03-18-2003 04:33 AM
jart gulf:

any ideas as to where you might find such a parabolic reflector? about the only thing i can find referenced is the coralife aqua mirror which is a flat design.

i suppose you could bend some polished sheet metal, but then you'd just be guessing at the angles, and might actually be better off with a flat surface.
02-18-2003 03:20 PM
GDominy Before;



After;

02-17-2003 01:57 PM
GulfCoastAquarian I'm also using White paint in one of my canopies and while the light is pretty brilliant, I am tempted to try an actual parabolic reflector. I wish I had a lux meter to actually quantify the difference, though!
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