Question on lights.

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Question on lights.

Post by Simb » Mon, 27 Dec 1999 04:00:00



I've had orchids for about a year and have taken up all our window
space possible in the Southfacing windows of my house, Atlanta, GA.

For Christmas my husband is going to install extra lights in my
bathroom for the orchids. I have a small collection but was wondering
if halogen and florecent light fixtures would be ok.  My collection
consists of about 12-15 philanopsis and about 10 oncidiums and a new
one I got because my neighbor is throwing it out.  I think it is a
"home depot" variety of a purple dendrobium.

The halogen light would be about 3 feet away from the top shelf and
florecent fixtures on the next three shelves.

Does this sound ok? and are the grow light bulbs for flouresent lights
that much better than regular light bulbs?

 
 
 

Question on lights.

Post by First Rays Orchid » Mon, 27 Dec 1999 04:00:00


I'm no artifical lighting expert, but the type, wattage, and number of bulbs
you use will have a major effect on the distance that you maintain between
the bulbs and the plants.

For example, when I lived in Atlanta, I grew all sorts of stuff under
fluorescents, keeping them between 6" and 12" from arrays of eight 40W
bulbs.  Phals farther, catts and most others closer.  (I have grown phals
under 2 bulbs, too.)

I don't really think most household halogen lamps will do you much good from
three feet or more, but without specifics, it's hard to say.

Remember, light intensity is an inverse-square rule - twice the distance
from the bulb has 1/4th the light intensity.

Another tidbit I recall from way back, don't let the brightness detected by
your eye fool you: full sun in Atlanta in the summer canhave an intensity of
5000-6000 footcandles or more.  Three feet from a single 40W fluorescent
bulb and you're down to about 50fc!

Last comment (please excuse the long-windedness) - Once you do get your
bathroom fitted out, it will fill rapidly.  Don't you have windows facing
other directions?

--

Ray Barkalow - First Rays Orchids

      Secure On-Line Ordering
      http://www.firstrays.com

Quote:

> I've had orchids for about a year and have taken up all our window
> space possible in the Southfacing windows of my house, Atlanta, GA.

> For Christmas my husband is going to install extra lights in my
> bathroom for the orchids. I have a small collection but was wondering
> if halogen and florecent light fixtures would be ok.  My collection
> consists of about 12-15 philanopsis and about 10 oncidiums and a new
> one I got because my neighbor is throwing it out.  I think it is a
> "home depot" variety of a purple dendrobium.

> The halogen light would be about 3 feet away from the top shelf and
> florecent fixtures on the next three shelves.

> Does this sound ok? and are the grow light bulbs for flouresent lights
> that much better than regular light bulbs?

 
 
 

Question on lights.

Post by simb » Mon, 27 Dec 1999 04:00:00



Yes, I have other windows, but the bathroom maintians the best warmth
and humidity than the rest of the house.  Most other rooms are quite
large and drafty.  Thanks for the details on lighting though.

Quote:
>I'm no artifical lighting expert, but the type, wattage, and number of bulbs
>you use will have a major effect on the distance that you maintain between
>the bulbs and the plants.

>For example, when I lived in Atlanta, I grew all sorts of stuff under
>fluorescents, keeping them between 6" and 12" from arrays of eight 40W
>bulbs.  Phals farther, catts and most others closer.  (I have grown phals
>under 2 bulbs, too.)

>I don't really think most household halogen lamps will do you much good from
>three feet or more, but without specifics, it's hard to say.

>Remember, light intensity is an inverse-square rule - twice the distance
>from the bulb has 1/4th the light intensity.

>Another tidbit I recall from way back, don't let the brightness detected by
>your eye fool you: full sun in Atlanta in the summer canhave an intensity of
>5000-6000 footcandles or more.  Three feet from a single 40W fluorescent
>bulb and you're down to about 50fc!

>Last comment (please excuse the long-windedness) - Once you do get your
>bathroom fitted out, it will fill rapidly.  Don't you have windows facing
>other directions?

>--

>Ray Barkalow - First Rays Orchids

>      Secure On-Line Ordering
>      http://www.firstrays.com


>> I've had orchids for about a year and have taken up all our window
>> space possible in the Southfacing windows of my house, Atlanta, GA.

>> For Christmas my husband is going to install extra lights in my
>> bathroom for the orchids. I have a small collection but was wondering
>> if halogen and florecent light fixtures would be ok.  My collection
>> consists of about 12-15 philanopsis and about 10 oncidiums and a new
>> one I got because my neighbor is throwing it out.  I think it is a
>> "home depot" variety of a purple dendrobium.

>> The halogen light would be about 3 feet away from the top shelf and
>> florecent fixtures on the next three shelves.

>> Does this sound ok? and are the grow light bulbs for flouresent lights
>> that much better than regular light bulbs?

 
 
 

Question on lights.

Post by TenRro » Mon, 27 Dec 1999 04:00:00


I use flourescent tubes exclusively.  There are HID light you can use, but I
wouldn't bother with halogen.  I have 4 40 watt grow light types above each of
my shelves.
http://www.charleysgreenhouse.com

Peggy, SAI region 22

 
 
 

Question on lights.

Post by Sylvain Van der Wald » Mon, 27 Dec 1999 04:00:00


On 26-Dec-99 18:16:39, simbi said about Re: Question on lights.:

Quote:

> Yes, I have other windows, but the bathroom maintians the best warmth
> and humidity than the rest of the house.  Most other rooms are quite
> large and drafty.  Thanks for the details on lighting though.

                     ******************************************

Simbi.
Something that wasn't answered: I would strongly urge you to get some 40W
 *wide spectrum* +5000K fluorescent tubes. I've had orchids for about one year
now (indoors), and noticed a *great* improvement when I started using (fairly
recently) one 40W full spectrum 6400K fluorescent lamp (It's a "Coralife", made
in the US). It's placed above eight plants; six phals and two oncidium.
P.S. I read this group every day, but I obtained a lot of info from an AOS
book (paperback): Growing orchids under lights, by Charles M Fitch, published in
1997.

Sylvain.

Quote:
>>I'm no artifical lighting expert, but the type, wattage, and number of bulbs
>>you use will have a major effect on the distance that you maintain between
>>the bulbs and the plants.

>>For example, when I lived in Atlanta, I grew all sorts of stuff under
>>fluorescents, keeping them between 6" and 12" from arrays of eight 40W
>>bulbs.  Phals farther, catts and most others closer.  (I have grown phals
>>under 2 bulbs, too.)

>>I don't really think most household halogen lamps will do you much good from
>>three feet or more, but without specifics, it's hard to say.

>>Remember, light intensity is an inverse-square rule - twice the distance
>>from the bulb has 1/4th the light intensity.

>>Another tidbit I recall from way back, don't let the brightness detected by
>>your eye fool you: full sun in Atlanta in the summer canhave an intensity of
>>5000-6000 footcandles or more.  Three feet from a single 40W fluorescent
>>bulb and you're down to about 50fc!

>>Last comment (please excuse the long-windedness) - Once you do get your
>>bathroom fitted out, it will fill rapidly.  Don't you have windows facing
>>other directions?

>>--

>>Ray Barkalow - First Rays Orchids

>>      Secure On-Line Ordering
>>      http://www.firstrays.com


>>> I've had orchids for about a year and have taken up all our window
>>> space possible in the Southfacing windows of my house, Atlanta, GA.

>>> For Christmas my husband is going to install extra lights in my
>>> bathroom for the orchids. I have a small collection but was wondering
>>> if halogen and florecent light fixtures would be ok.  My collection
>>> consists of about 12-15 philanopsis and about 10 oncidiums and a new
>>> one I got because my neighbor is throwing it out.  I think it is a
>>> "home depot" variety of a purple dendrobium.

>>> The halogen light would be about 3 feet away from the top shelf and
>>> florecent fixtures on the next three shelves.

>>> Does this sound ok? and are the grow light bulbs for flouresent lights
>>> that much better than regular light bulbs?

--

Connected via Wirenet - the UK's first Amiga only internet provider
 
 
 

Question on lights.

Post by simb » Tue, 28 Dec 1999 04:00:00


Sylvain,
How far in distance are your flourecent tubes from the plants.  My
shelves will be adjustable so I am trying to claculate how many
shelves I can get.  Thanks.


Quote:
>On 26-Dec-99 18:16:39, simbi said about Re: Question on lights.:

>> Yes, I have other windows, but the bathroom maintians the best warmth
>> and humidity than the rest of the house.  Most other rooms are quite
>> large and drafty.  Thanks for the details on lighting though.
>                     ******************************************

>Simbi.
>Something that wasn't answered: I would strongly urge you to get some 40W
> *wide spectrum* +5000K fluorescent tubes. I've had orchids for about one year
>now (indoors), and noticed a *great* improvement when I started using (fairly
>recently) one 40W full spectrum 6400K fluorescent lamp (It's a "Coralife", made
>in the US). It's placed above eight plants; six phals and two oncidium.
>P.S. I read this group every day, but I obtained a lot of info from an AOS
>book (paperback): Growing orchids under lights, by Charles M Fitch, published in
>1997.

>Sylvain.

>>>I'm no artifical lighting expert, but the type, wattage, and number of bulbs
>>>you use will have a major effect on the distance that you maintain between
>>>the bulbs and the plants.

>>>For example, when I lived in Atlanta, I grew all sorts of stuff under
>>>fluorescents, keeping them between 6" and 12" from arrays of eight 40W
>>>bulbs.  Phals farther, catts and most others closer.  (I have grown phals
>>>under 2 bulbs, too.)

>>>I don't really think most household halogen lamps will do you much good from
>>>three feet or more, but without specifics, it's hard to say.

>>>Remember, light intensity is an inverse-square rule - twice the distance
>>>from the bulb has 1/4th the light intensity.

>>>Another tidbit I recall from way back, don't let the brightness detected by
>>>your eye fool you: full sun in Atlanta in the summer canhave an intensity of
>>>5000-6000 footcandles or more.  Three feet from a single 40W fluorescent
>>>bulb and you're down to about 50fc!

>>>Last comment (please excuse the long-windedness) - Once you do get your
>>>bathroom fitted out, it will fill rapidly.  Don't you have windows facing
>>>other directions?

>>>--

>>>Ray Barkalow - First Rays Orchids

>>>      Secure On-Line Ordering
>>>      http://www.firstrays.com


>>>> I've had orchids for about a year and have taken up all our window
>>>> space possible in the Southfacing windows of my house, Atlanta, GA.

>>>> For Christmas my husband is going to install extra lights in my
>>>> bathroom for the orchids. I have a small collection but was wondering
>>>> if halogen and florecent light fixtures would be ok.  My collection
>>>> consists of about 12-15 philanopsis and about 10 oncidiums and a new
>>>> one I got because my neighbor is throwing it out.  I think it is a
>>>> "home depot" variety of a purple dendrobium.

>>>> The halogen light would be about 3 feet away from the top shelf and
>>>> florecent fixtures on the next three shelves.

>>>> Does this sound ok? and are the grow light bulbs for flouresent lights
>>>> that much better than regular light bulbs?
>--

>Connected via Wirenet - the UK's first Amiga only internet provider

 
 
 

Question on lights.

Post by Sylvain Van der Wald » Tue, 28 Dec 1999 04:00:00


Quote:
>Sylvain,
>How far in distance are your flourecent tubes from the plants.  My
>shelves will be adjustable so I am trying to claculate how many
>shelves I can get.  Thanks.

Simbi.
Yours is not an easy question to answer in view of the different plant heights,
and the fact that I'm only using a single lamp at the present time. This lamp is
used to *supplement* the normal daylight which is not good enough by itself.
The single lamp, which is mounted on a wooden frame with chains and hooks for
height adjustment, allows me to place the plants on either side of it so that
tall spikes etc.. are allowed for. The distance between the lamp and the top of
the 4.5 inches pots is *9 inches.*
The AOS book's author (who uses more lamps) specifies for Phals 6 to 10 inches,
and for Oncidiums 3 to 6 inches (I think that this is measured from the top of
the plant). I hope that this helps a little.
Quote:

>>On 26-Dec-99 18:16:39, simbi said about Re: Question on lights.:

>>> Yes, I have other windows, but the bathroom maintians the best warmth
>>> and humidity than the rest of the house.  Most other rooms are quite
>>> large and drafty.  Thanks for the details on lighting though.
>>                     ******************************************

>>Simbi.
>>Something that wasn't answered: I would strongly urge you to get some 40W
>> *wide spectrum* +5000K fluorescent tubes. I've had orchids for about one year
>>now (indoors), and noticed a *great* improvement when I started using (fairly
>>recently) one 40W full spectrum 6400K fluorescent lamp (It's a "Coralife",
>>made in the US). It's placed above eight plants; six phals and two oncidium.
>>P.S. I read this group every day, but I obtained a lot of info from an AOS
>>book (paperback): Growing orchids under lights, by Charles M Fitch, published
>>in
>>1997.

>>Sylvain.

>>>>I'm no artifical lighting expert, but the type, wattage, and number of bulbs
>>>>you use will have a major effect on the distance that you maintain between
>>>>the bulbs and the plants.

>>>>For example, when I lived in Atlanta, I grew all sorts of stuff under
>>>>fluorescents, keeping them between 6" and 12" from arrays of eight 40W
>>>>bulbs.  Phals farther, catts and most others closer.  (I have grown phals
>>>>under 2 bulbs, too.)

>>>>I don't really think most household halogen lamps will do you much good from
>>>>three feet or more, but without specifics, it's hard to say.

>>>>Remember, light intensity is an inverse-square rule - twice the distance
>>>>from the bulb has 1/4th the light intensity.

>>>>Another tidbit I recall from way back, don't let the brightness detected by
>>>>your eye fool you: full sun in Atlanta in the summer canhave an intensity of
>>>>5000-6000 footcandles or more.  Three feet from a single 40W fluorescent
>>>>bulb and you're down to about 50fc!

>>>>Last comment (please excuse the long-windedness) - Once you do get your
>>>>bathroom fitted out, it will fill rapidly.  Don't you have windows facing
>>>>other directions?

>>>>--

>>>>Ray Barkalow - First Rays Orchids

>>>>      Secure On-Line Ordering
>>>>      http://www.firstrays.com


>>>>> I've had orchids for about a year and have taken up all our window
>>>>> space possible in the Southfacing windows of my house, Atlanta, GA.

>>>>> For Christmas my husband is going to install extra lights in my
>>>>> bathroom for the orchids. I have a small collection but was wondering
>>>>> if halogen and florecent light fixtures would be ok.  My collection
>>>>> consists of about 12-15 philanopsis and about 10 oncidiums and a new
>>>>> one I got because my neighbor is throwing it out.  I think it is a
>>>>> "home depot" variety of a purple dendrobium.

>>>>> The halogen light would be about 3 feet away from the top shelf and
>>>>> florecent fixtures on the next three shelves.

>>>>> Does this sound ok? and are the grow light bulbs for flouresent lights
>>>>> that much better than regular light bulbs?
>>--

>>Connected via Wirenet - the UK's first Amiga only internet provider