Re: [APD] do it yourself reflectors...

[Tundra plants <TundraPlants at gmail_com>]

Stealing from thekrib:

> These figures are from an old hydroponics source.  Unfortunately I
> know longer have the URL.  These figures, represent  the percentange
> of light reflected.

>     Mylar 90-95
>     Flat white paint 85-93
>     Semi-gloss white 75-80
>     Flat yellow 70-80
>     Aluminum foil 70-75

Mylar can be easily found in the form of solar blankets (2-3$ at your
local camping / sporting goods store), White paint has generally been
my favorite.

Andy


On Tue, 14 Sep 2004 10:18:52 -0300, Benjamin Hong <bkhong at rogers_com> wrote:
> I was trying to find stuff on DIY reflectors, and had little success, so I
> just spent about $10 on mirror tiles at Walmart and covered the inside of
> the hood with them.  Tedious, but effective.
> 
> B.
> ------------------------------
> 
> Message: 3
> Date: Mon, 13 Sep 2004 16:07:12 +0200
> From: "Phillip Grobler" <pfgrobler at hotmail_com>
> Subject: [APD] Submerged light.
> To: <aquatic-plants at actwin_com>
> 
> I was reading up again on the argument of wether the depth of the tank
> influences the ammount of light needed. And now I'm wondering. The
> distance between the bulb and the water surface seems to have a reletavily
> large effect an the ammount of light that actualy reached the bottom of the
> tank. Whould it not make sence to place the tubes them selfs under the
> water surface ?
> 
> If you use CF's or PC's it should be fairly simple process to get a water
> tight
> seal arround the electrical connections.
> 
> On my own tank has a glass lid that is actualy still part of the main tank
> so
> it whould be very easy to flood the lid and have the tubes submerged. I
> realise that heat from the bulbs might then become a problem.
> 
> Does someone have a link to a good  DIY reflector design, idealy with
> comparisons to other reflectors.
> 
> Phillip Grobler
> Cell: +27 083 654 0250
> Instant messaging:
> MSN: pfgrobler at hotmail_com
> Yahoo: pfgrobler at yahoo_co.uk
> 
> ------------------------------
> 
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