Looking for information on DLI
Login
User Name
Password   


Registration is FREE. Click to become a member of OrchidBoard community
(You're NOT logged in)

menu menu

Sponsor
Donate Now
and become
Forum Supporter.

Looking for information on DLI
Many perks!
<...more...>


Sponsor
 

Google


Fauna Top Sites
LOG IN/REGISTER TO CLOSE THIS ADVERTISEMENT
  #1  
Old 11-17-2020, 01:45 AM
lisawysong lisawysong is offline
Jr. Member
 

Join Date: Jul 2017
Posts: 7
Looking for information on DLI
Default Looking for information on DLI

Hi, I have been growing my orchids under light for some time now. and have been mostly guessing the DLI of my orchids by extrapolating from a Phal DLI of 4-10 and going up from there. I was just curious if anyone knew of any new research on the DLI of different species of Orchids, or even if anyone has some anecdotal evidence on their experiences with DLI and growing various species?
Thanks
Reply With Quote
  #2  
Old 11-17-2020, 04:40 PM
WaterWitchin's Avatar
WaterWitchin WaterWitchin is offline
Super Moderator
 

Join Date: Feb 2011
Zone: 6a
Location: Kansas
Posts: 2,875
Default



I have not a clue what DLI is, but I'm bumping this up for ya. Perhaps someone who knows lighting will chime in soon.

Oh Bill?? Where are ya buddy?
__________________
Caveat: Everything suggested is based on my environment and culture. Please adjust accordingly.
Reply With Quote
  #3  
Old 11-17-2020, 05:21 PM
Ray's Avatar
Ray Ray is offline
Senior Member
 

Join Date: May 2005
Member of:AOS
Location: Oak Island NC
Posts: 12,277
Looking for information on DLI Male
Default

DLI = Daily Light Integral = the number of PAR photons the plant must be exposed to over the course of a day in order to grow and bloom properly, expressed in moles.

It is meant to be a way to quantify lighting better than existing measures.
__________________
Ray Barkalow, Orchid Iconoclast
Want Better Plants? READ THIS
firstrays.com

Free Shipping in the US! (see terms & conditions for details)
Reply With Quote
  #4  
Old 11-17-2020, 09:38 PM
WaterWitchin's Avatar
WaterWitchin WaterWitchin is offline
Super Moderator
 

Join Date: Feb 2011
Zone: 6a
Location: Kansas
Posts: 2,875
Default

Quote:
Originally Posted by Ray View Post
DLI = Daily Light Integral = the number of PAR photons the plant must be exposed to over the course of a day in order to grow and bloom properly, expressed in moles.

It is meant to be a way to quantify lighting better than existing measures.
Well of course Bill! Around here, we just whack the moles that show up.
__________________
Caveat: Everything suggested is based on my environment and culture. Please adjust accordingly.
Reply With Quote
Post Thanks / Like - 1 Likes
Likes Roberta liked this post
  #5  
Old 11-18-2020, 01:41 PM
terryros terryros is offline
Senior Member
 

Join Date: Feb 2008
Zone: 4a
Location: Minneapolis, MN
Posts: 258
Looking for information on DLI Male
Default

Low light orchids are in the 4-6 DLI range and high light orchids (Cattleyas) are in the 10-14 range.

You need a light meter that measures the peak photon density in micro moles/meter squared/sec just in the photosynthetically active radiation (PAR) range (400-700 nm). Look at the Apogee full spectrum as an example. DLI takes the number of seconds of light in the day and multiplies times the peak photon density per second.
Reply With Quote
Post Thanks / Like - 2 Likes
Likes wisdomseeker, camille1585 liked this post
  #6  
Old 11-18-2020, 03:59 PM
Ray's Avatar
Ray Ray is offline
Senior Member
 

Join Date: May 2005
Member of:AOS
Location: Oak Island NC
Posts: 12,277
Looking for information on DLI Male
Default

Quote:
Originally Posted by terryros View Post
DLI takes the number of seconds of light in the day and multiplies times the peak photon density per second.
If it's continuous, artificial light, it's that easy - photon flux x time - but for natural light, you either estimate it as a triangular function with the highest measured flux of the day, or you have to take periodic readings and integrate them.

WW - aren't you glad you asked?
__________________
Ray Barkalow, Orchid Iconoclast
Want Better Plants? READ THIS
firstrays.com

Free Shipping in the US! (see terms & conditions for details)
Reply With Quote
  #7  
Old 11-18-2020, 04:37 PM
WaterWitchin's Avatar
WaterWitchin WaterWitchin is offline
Super Moderator
 

Join Date: Feb 2011
Zone: 6a
Location: Kansas
Posts: 2,875
Default

Oh come on Bill! I was just bumping someone up who wasn't being answered and hollering for help for someone who could answer. I already knew it would get more complex than I could handle.

Triangulation? Photon flux? Is that like a flux capacitator? I hear they can run on beer cans and banana peels now....
__________________
Caveat: Everything suggested is based on my environment and culture. Please adjust accordingly.
Reply With Quote
  #8  
Old 11-18-2020, 04:58 PM
camille1585's Avatar
camille1585 camille1585 is offline
Administrator
 

Join Date: Oct 2007
Location: middle of the Netherlands
Posts: 12,630
Default

I agree with terryros. I had looked this up for work purposes and came up with a DLI of 3-5 for Phals and other low light plants, and 10-12 for high light orchids like Catts.

If you don't have or have access to a decent quality quantum light meter, you are probably better off determining your light levels with more traditional units (eg lux or fc).

---------- Post added at 09:58 PM ---------- Previous post was at 09:49 PM ----------

Quote:
Originally Posted by WaterWitchin View Post
Oh come on Bill! I was just bumping someone up who wasn't being answered and hollering for help for someone who could answer. I already knew it would get more complex than I could handle.

Triangulation? Photon flux? Is that like a flux capacitator? I hear they can run on beer cans and banana peels now....
I live and breath this stuff for a living, as I have to determine optimal growth recipes (light included) for a large number of crops in indoor farming conditions.

Have a look at this article, I think it explains things in a way which should be palatable for those who know little about the topic.

About PAR, PPF, And PPFD - Fluence By OSRAM
__________________
Camille

Completely orchid obsessed and loving every minute of it....

My Orchid Photos
Reply With Quote
  #9  
Old 11-18-2020, 05:00 PM
estación seca's Avatar
estación seca estación seca is offline
Senior Member
Looking for information on DLI
 

Join Date: Jun 2015
Zone: 9b
Location: Phoenix AZ - Lower Sonoran Desert
Posts: 11,787
Looking for information on DLI Male
Default

My neighbor asked to borrow an avogadro for making wacamole.
__________________
May the bridges I've burned light my way.

Weather forecast for my neighborhood
Reply With Quote
Post Thanks / Like - 1 Likes
Likes WaterWitchin liked this post
  #10  
Old 11-18-2020, 05:02 PM
Roberta's Avatar
Roberta Roberta is offline
Super Moderator
 

Join Date: Jun 2008
Zone: 10a
Location: Coastal southern California, USA
Posts: 5,992
Looking for information on DLI Female
Default

Quote:
Originally Posted by estación seca View Post
My neighbor asked to borrow an avogadro for making wacamole.


This stuff is interesting!
__________________
"Extraordinary claims require extraordinary evidence" Carl Sagan

Roberta's Orchids (Visit my back yard)

What's blooming for Southern California Species hobbyists (New page for January 2021)
Reply With Quote
Reply

Bookmarks

Tags
dli, growing, orchids, research, species


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Display Modes Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off


All times are GMT -4. The time now is 06:26 AM.

© 2007 OrchidBoard.com
Search Engine Optimisation provided by DragonByte SEO v2.0.37 (Lite) - vBulletin Mods & Addons Copyright © 2021 DragonByte Technologies Ltd.
Feedback Buttons provided by Advanced Post Thanks / Like (Lite) - vBulletin Mods & Addons Copyright © 2021 DragonByte Technologies Ltd.

Clubs vBulletin Plugins by Drive Thru Online, Inc.