Are these new LED-based lamps suitable for growing a certain tropical
plant in your attic? They're apparently much more efficient and produce
more lumins per Watt and less heat. But is less heat a drawback in this
particular application? Do the plants require heat as much as light?
On Fri, 17 Apr 2015 18:21:29 +0000 (UTC), Julian Barnes
Seems LED lighting for horticulture is becoming quite popular,
replacing fluorescents http://tinyurl.com/kupkj4o
Discussion here http://tinyurl.com/nkqplde
and here http://tinyurl.com/l3rervj
The getting the correct wavelength of light for a particular crop may
be important. As to heat, some things don't require much heat, other
things may need quite a lot. But it has to be better to supply heat
and light separately, as they can then be independently controlled.
But why would you want to grow tomatoes in your attic?
On Friday, April 17, 2015 at 8:07:10 PM UTC+1, Chris Hogg wrote:
Poorly informed discussion
"Photoperiodic lighting - because of spectral output and cost consideration
s, tungsten light bulbs have remained the light source of choice for this a
pplication for many years. However, tungsten light bulbs were phased out by
the UK Government on 1st September 2011 "
Tungsten is still alive and in the shops and has never been used for hortul
LED as a supplement to 600W HPS
LEDs tend to be not so great for flowering plants, vegetative growth they`r
On Fri, 17 Apr 2015 12:22:05 -0700 (PDT), Adam Aglionby
You're wrong about that last bit. Tungsten lamps were widely used in
the early days, before fluorescents came along. It's referred to in
several of the articles linked to here http://tinyurl.com/lt8goft . I
don't know the wattage commonly used, but I have a reference from the
early 1960's to a row of 250 watt lamps being used to extend day
length and speed up the growth of camellia seedlings*. Tungsten lamps
are still available for household use, but are these high-wattage ones
*Treseder & Hyams, 'Growing Camellias', Nelson, 1975, p.139
On Saturday, April 18, 2015 at 5:43:52 PM UTC+1, Chris Hogg wrote:
ions, tungsten light bulbs have remained the light source of choice for thi
s application for many years. However, tungsten light bulbs were phased out
by the UK Government on 1st September 2011 "
Thats fascinating Thanks Chris, guessing probably referring to 250W GLS, c
onventional bulb shaped lamps, the tungsten halogen lamp didn`t come about
till the late 50`s and would have still been an exotic lamp then.
Always thought too much IR in tungsten to be useful, that and lamp life isn
`t anywhere near the 10K+ hours can get out of HPS,current HPS/HID like flu
ro are result of decades of development now.
Tungsten daylight/grow/craft/sad lamps are a con, all it is is a blue coati
ng on the lamp.
Always struck me that a house with a generous cellar would make a far
better growing emporium. Out of sight of the thermal cameras, wate heat,
if wanted would tend to heat the house any noise of equipment would be
Perhaps one of those fine converted houses in Kensington with the 4
On Mon, 20 Apr 2015 06:03:52 -0700 (PDT), whisky-dave
ITYM thrips; they like warm, humid conditions (they're aka
thunder-bugs). This link http://tinyurl.com/ow2w956 does suggest
forced air circulation using powerful fans to blow them away, but I
have difficulty in believing that it is very effective. There are
plenty of better ways.
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