User Tag List

Informational! Informational!:  0
Likes Likes:  0
Page 2 of 2 FirstFirst 12
Results 9 to 12 of 12

Thread: artificial lighting for cephalotus

  1. #9

    Join Date
    Feb 2009
    Location
    singapore
    Posts
    35
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    hey frilleon..thanks a mil..that clears everything on lighting distance for me..

  2. #10
    Hello, I must be going... Not a Number's Avatar
    Join Date
    Nov 2006
    Location
    Los Angeles, CA
    Posts
    7,506
    Mentioned
    5 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by Frilleon View Post
    Light degrads over distance exponentially. Meaning 0-6" from light you get close to the light bulb output. 6-12" you get half. 12-24" you get half again. This will differ with different lights and fixtures but is a close enough discription for you to get the idea.
    Your math isn't right. Light energy is subject to the inverse square law - 1/rČ

    So if you double the distance you get 1/4 the amount of light. Triple the distance gives you 1/9 the amount of light, quadruple the distance gets 1/16.

    What you're saying - 12" = 1/2, 24" = 1/4
    when it should be - 12" = 1/4, 24" = 1/16

    http://csep10.phys.utk.edu/astr162/l...intensity.html
    http://en.wikipedia.org/wiki/Inverse_square_law

    BTW: 6 tubes of 2 foot T5 lighting is probably more than adequate but will throw out quite a bit of heat. Use with caution.
    Grand Hotel... always the same. People come, people go. Nothing ever happens.

  3. #11
    Frilleon's Avatar
    Join Date
    Dec 2008
    Location
    Sonoma County CA
    Posts
    643
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Yeah I didn't know the exact numbers. I was just trying to get the point across. In fact I had read one of your post on this before.
    Grow List: http://www.terraforums.com/forums/sh...d.php?t=116427
    Member of BACPS & ICPS

    A question that sometimes drives me hazy: am I or are the others crazy? Albert Einstein

  4. #12

    Join Date
    Feb 2009
    Location
    singapore
    Posts
    35
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    well,thanks for the pointers frilleon..it really did shed some light to the question that've been hovering over my head..sori for being paranoid..its my first ever cephalotus.. :P

Page 2 of 2 FirstFirst 12

Similar Threads

  1. Info on artificial lighting
    By Outsiders71 in forum Greenhouses, Terrariums and Bog Gardens
    Replies: 4
    Last Post: 07-12-2005, 11:49 AM
  2. Artificial lighting suitible for vft
    By al885 in forum Venus Flytrap (Dionaea ) Care Information & Tips
    Replies: 14
    Last Post: 08-17-2004, 08:11 PM
  3. Artificial lighting
    By in forum General Discussions
    Replies: 8
    Last Post: 09-23-2002, 08:46 AM
  4. artificial lighting for highland neps
    By Leo in forum Tropical Pitcher Plants  (Nepenthes)
    Replies: 20
    Last Post: 06-09-2002, 10:51 AM
  5. Artificial Lighting
    By Ulzar in forum Venus Flytrap (Dionaea ) Care Information & Tips
    Replies: 1
    Last Post: 05-07-2002, 08:36 PM

Tags for this Thread

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •