Shop Orchid Care OrchidTalk Orchid Forum Weather Station Links Nursery

Welcome to OrchidTalk Orchid Forums


The Friendliest Orchid Community on the Internet!


  •  » Learn to Repot your Orchids
  •  » Learn Orchid Care Tips and Secrets
  •  » Find the perfect Orchid for your Growing Environment
  •  » Chat with Orchid Growing Professionals

OrchidTalk - "Bringing People Together to Grow Orchids Better!"


Let us help you grow your Orchids better; Join our community today.


YES! I want to register an account for free right now!


Register or Login now to remove this advertisement.

Results 1 to 5 of 5

Artificial light quality

This is a discussion on Artificial light quality within the Semi Hydro / Lights / Greenhouses / Accessories forums, part of the Orchid Culture category; I have several Phal orchids both in greenhouse and under artificial lights. It appears that ...

Click here to increase the font size Click here to reduce the font size
  1. #1
    moniluhum is offline Senior Member
    Real Name
    Monica
    My Grow Area
    Greenhouse
    Join Date
    Dec 2012
    Gender
    Female
    Location
    New Orleans, Louisiana
    Posts
    977

    Default Artificial light quality

    I have several Phal orchids both in greenhouse and under artificial lights. It appears that those under artificial lights have healthy roots but their leaves appear to be less healthy than those in the greenhouse. Could it be that the lights are too close? What could be causing this problem?Name:  IMG_2981.jpg
Views: 920
Size:  47.8 KB

  2. #2
    BigSteve's Avatar
    BigSteve is offline Senior Member
    Real Name
    Steve
    My Grow Area
    Under Lights
    Favorite Orchid(s)
    Paph Roth's
    Join Date
    Aug 2013
    Gender
    Male
    Location
    UK
    Posts
    400
    Member's Country Flag

    Default

    Could the lights be the sole reason for the plants lack of leaves , i suppose so.My Phal's tend to have less leaves than the 1's i have given to friends & family, they grow in windowsill',s , me under lights & in the greenhouse.I believe the plants require less leaves under my care because they have plenty of light all year round & my hybrids tend to grow a new leaf then spike, this can be twice or three times a year.Whereas my friends/familys Phal,s tend to spike once & maybe grow a couple of leaves in between flowering.
    Reducing the light(less hours/lower levels) under lights may make the plants grow more foliage to compensate but also a change to other growing variables may achieve the same.
    Personally if the plants under lights are healthy & still flowering then i wouldn't worry about them to much , maybe give them a holiday in the greenhouse every now & again.

  3. #3
    raybark's Avatar
    raybark is offline Senior Member
    Real Name
    Ray Barkalow
    My Grow Area
    Under Lights
    Join Date
    Oct 2012
    Location
    Oak Island NC
    Posts
    1,278

    Default

    It may be that you have them too close to the lights, affecting the plants in potentially two ways.

    Excessive light levels can actually decrease the flowering of many orchids.

    And, if the light intensity is to great, it can overheat the leaves, disrupting the chemical processes that go on within them.

  4. #4
    Missanna is offline Cattleya lover
    My Grow Area
    Under Lights
    Favorite Orchid(s)
    Cattleya- anything fragrant
    Join Date
    Sep 2014
    Gender
    Female
    Location
    idaho
    Posts
    49

    Default

    First off, as a lights grower myself, it is hard to give any advice without knowing some more information:

    what kind of lights are you using? (T12, t5, HID etc)
    How many bulbs and how long are they? (Assuming you are using fluorescents)
    What is the distance from leaves to bulbs?
    What is your photoperiod?

    I'm sure I will have more questions after you answer those.

    Also, Ray brings up a good point: you need to feel the leaves after the lights have been on for a few hours. If they are even sightly warm to you, they are too warm. Remember that our outer body temperature is about 90 degrees which is too hot for the leaves.

    ---------- Post Merged at 12:06 AM ----------

    Also do you have more photos of the orchids you do have under lights?

  5. #5
    moniluhum is offline Senior Member
    Real Name
    Monica
    My Grow Area
    Greenhouse
    Join Date
    Dec 2012
    Gender
    Female
    Location
    New Orleans, Louisiana
    Posts
    977

    Default

    The lights are t5 Hydrofarm. There are 4 bulbs that are I think 24 inches long. The distance is about 20 inches and the light period is about 12 hours.

Similar Threads

  1. Transferring from artificial light and outside
    By moniluhum in forum General Orchid Culture
    Replies: 2
    Last Post: May 8th, 2014, 01:32 AM
  2. Transition from artificial light to outside
    By moniluhum in forum General Orchid Culture
    Replies: 10
    Last Post: April 6th, 2014, 07:09 AM
  3. Orchid artificial light experiment
    By deedlelu in forum General Orchid Culture
    Replies: 3
    Last Post: February 17th, 2013, 08:54 AM
  4. Switching from natural light to artificial light
    By Alplily NH in forum Semi Hydro / Lights / Greenhouses / Accessories
    Replies: 6
    Last Post: September 26th, 2010, 02:13 PM
  5. artificial light foliage effects or virus ?
    By sunset in forum General Orchid Culture
    Replies: 8
    Last Post: January 31st, 2006, 01:25 PM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  
OrchidTalk --An Orchid Growers Discussion Forum brought to you by River Valley Orchidworks. A World Community where orchid beginners and experts talk about orchids and share tips on their care, cultivation, and propagation.