Orchid Care OrchidTalk Orchid Forum 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 2 of 2

Thread: Lighting for Cattleyas (How to determine how many FC/Lumens/Watts

Click here to increase the font size Click here to reduce the font size
  1. #1
    Join Date
    Apr 2012

    Default Lighting for Cattleyas (How to determine how many FC/Lumens/Watts

    I am growing some Cattleyas on two table top lamp stands that have two 24" T5 LED bulbs each .
    I can not get the information that I am looking for about which of these light measurements to use.
    Thanks, in advance.


  2. #2
    Real Name
    Ray Barkalow
    My Grow Area
    Join Date
    Oct 2012
    Oak Island NC


    If you can tell us what you’re trying to accomplish by determining any of that info, maybe we can help more.

    Watts, alone, may not be of much value, as that’s the power consumption of the entire lamp, and lamps can have different light-producing efficiency levels.

    Lumens tells you the initial light level emitted by the lamp, but as lamp geometry and distance from the plants vary, it tells you nothing about the light hitting the plant. In a T5 fluorescent, for example, the “initial lumens” tells the total output, but the light emitted by the parts of the tube facing upward is lost to a significant degree.

    Foot-candles are a measure of light intensity, so is basically “what the plant sees”. A foot-candle is a lumen/square foot. (The metric equivalent, lux, is a lumen/square meter.)

Similar Threads

  1. Lumens for my new phalaenopsis
    By Clark711 in forum New Growers: Ask the Senior Members
    Replies: 1
    Last Post: September 14th, 2020, 09:28 AM
  2. how to determine what type of orchid I have?
    By DaddioAZ in forum General Information
    Replies: 12
    Last Post: June 17th, 2016, 12:10 AM
  3. LED lighting.
    By Dorsetman in forum Semi Hydro / Lights / Greenhouses / Accessories
    Replies: 12
    Last Post: December 8th, 2013, 04:27 PM
  4. Lighting ????
    By meviva in forum Semi Hydro / Lights / Greenhouses / Accessories
    Replies: 1
    Last Post: February 22nd, 2008, 02:05 PM
  5. I need lighting help please
    By Tikva in forum General Orchid Culture
    Replies: 3
    Last Post: November 14th, 2007, 06:54 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.