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Re: [APD] do it yourself reflectors...
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
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.
> 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
> seal arround the electrical connections.
> On my own tank has a glass lid that is actualy still part of the main tank
> 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
> Aquatic-Plants mailing list
> Aquatic-Plants at actwin_com
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