2015 Archived Messages

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Links to all the Photos and other images accompanying the list messages can be found on the Images page.

January 1-7 8-14 15-21 22-31 February 1-7 8-14 15-21 22-28
March 1-7 8-14 15-21 22-31 April 1-7 8-14 15-21 22-30
May 1-7 8-14 15-21 22-31 June 1-7 8-14 15-21 22-30
July 1-7 8-14 15-21 22-31 August 1-7 8-14 15-21 22-31
September 1-7 8-14 15-21 22-30 October 1-7 8-14 15-21 22-31
November 1-7 8-14 15-21 22-30 December 1-7 8-14 15-21 22-31

1—7 October

From: Geoff. Hands
To: Orchid Talk List
Subject: Anyone want lighting gear ? Going free......
Date: Sun, 04 Oct 2015 19:40

I have about 4 sets of 400watt lights. Metal ballasts, lamp bulbs, reflector
s, control gear etc.....going free, but would have to be collected. Too heav
y and or breakable to post. Also some 250watt ( from memory) fluorescent uni

I was very happy with the extra growth and amazing root growth on cattleyas I
got with them, but took them out when I had my big set of changes two years
ago, and changed my growing conditions. Since then. I have started using L
EDs and am following up on that line.

I want the space backin my garden shed, and if no one is interested will tak
e them to the Council tip....

The current used is not quite what it says on the label. Actually it falls a
s the bulbs warm up and the light colour changes. And the current used is n
ot all extra cost, since as the lighting bill goes up, the heating bill come
s down − they are of course running white hot, so some heat is radiated out w
ith the light.

If interested, drop me a line..... I will clear out what is left when I do m
y winter clear up in the garden in a month or so.


Sent from my iPad


From: Mark Macklam
To: Orchid Talk List
Subject: Re: [OrchidTalk] Anyone want lighting gear ? Going free......
Date: Mon, 05 Oct 2015 22:35


I am interested in the fact that you are using LED lamps. My memory is a bit hazy on this but are not LEDS deficient in I think it is, red, or blue? I am a picture painter and looked into LEDS for my studio and decided to use some very accurate daylight fluorescents made for my purpose instead. Your comments will be appreciated.



From: Geoff. Hands
To: Orchid Talk List
Subject: Re: [OrchidTalk] Anyone want lighting gear ? Going free......
Date: Tue, 06 Oct 2015 17:00

Hi Mark.
Well, they (LEDs) come In any colour you want !
So I use red, blue, infra-red, and a few white. For plants, a big chunk of the spectrum is useless. They need one specific wavelength to make sugars − that is the basic photosynthesis stuff taught in primary school biology, a different wavelength to produce atp ( adeno-tri-phosphate ) which is the basic fuel used by all animal and plant cells to power reactions,another to synthesise the complex acids used in making the colours in flowers, and so on....
So the really efficient way of using light is to have the different colours- corresponding to the required wavelengths, as separate diodes, in the correct ratio of so many red, to so many blue, and so on...all adding up to a huge increase in efficiency, .added to which the LED current consumption seems to be only a small fraction of that used by a big metal ballast lamp, for the same energy production....

I have dabbled with painting from time to time in my life, but ne'er too seriously because I could see that my efforts were worthless. I could − can, draw, and once did pen and ink sketches, ( towns capes, buildings etc ) with ink washes for light and shade, which were good enough for my kids to beg, and frame, and hang. But accurate colour is quite a big call . When I did serious photography , I thought it better to show colours which I thought artistically right, rather than "true colours".



Sent from my iPad


From: Peter Fowler
To: Orchid Talk List
Subject: Orchid Books.
Date: Wed, 07 Oct 2015 12:40

Hi All. I have a set of perfect Lindenia, in 5 volumes, for sale. As they weigh heavy, about 15 Kg.
Buyer collects or if you want to pay the high postal costs, then so be it.
Also have Hawkes.
Just make me an offer for the Lindenia volumes. Nothing too silly, please, as they cost me £600
when new, but can offer a large discount.
Weather awful.
Best wishes,
Peter Fowler.

Sent from my iPad


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