Light bleaching

Discussion in 'Indoor Growing' started by Steelwool, Dec 22, 2009.

  1. Steelwool

    Steelwool Registered+

    So I vegged my girls under CFLs for four weeks and stuck them under a 600W HPS. Right off the bat the large fan leaves showed signs of bleaching. I raised the light to about 4 feet away and temps are mid to upper 70s but it still seems to be going on with the larger fan leaves. Should I even worry about it? The newer leaves seem fine but it's starting to effect most all the larger fan leaves. Will it cause my plants to grow smaller/slower? What should I do?
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  2. Felixthecat

    Felixthecat Registered

    Last edited: Dec 22, 2009
  3. Dutch Pimp

    Dutch Pimp Up in Smoke

    They might not have been ready for that much strong light all at once? Try and keep a cool air flow between the light and the top of the plants.

    Attached Files:

  4. Steelwool

    Steelwool Registered+

    Thanks for the graph! Great info. Something I have always wondered about. I'll probably raise the light a bit more and get them use to it. It was just so sudden it freaked me out. Thanks!
  5. Dutch Pimp

    Dutch Pimp Up in Smoke probably freaked them out, too....:jointsmile:

    It's funny, you posted about this subject...I just light bleached the fuck out of two white widows....:mad: ...using a 400 watt CMH bulb. Nothing to be done about it now...except move them, further from the light. This was a slow progression bleaching; that I didn't realize what it was...:wtf:

    Will post pics...when I have time.
  6. jamessr

    jamessr Registered+

    I read something about the bleaching is caused by the mercury leaking out of the bulb.:wtf: Could this be a fact or not?
  7. EvilCartman

    EvilCartman Registered+

    Not. :tin foil hat:

    You can induce light-bleaching with an air-cooled hood enclosing the bulb. (if you really want to) :thumbsup:
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  8. Dutch Pimp

    Dutch Pimp Up in Smoke

    don't look past the obvious...the light was too close...:cool:
  9. Dutch Pimp

    Dutch Pimp Up in Smoke

    Dutch Dumbass-bleaches his plants!

    Not the best pics in the world...but, a good example of light bleaching. Two WW plants 3 weeks into 12/12. It was a slow progressive thing; That I thought was a nute problem...WRONG! The one the left; started during week #2, but I didn't recognize the problem. It has always been a runt, with a poor root system, compared to her bigger sister. Then big sister started showing the same symptoms, a week later.......:i feel stupid:...I screwed the pooch on these...:pimp:...the buds still seem to be growing far...we'll see what happens next?

    Attached Files:

    Last edited: Dec 23, 2009

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