Light bleaching

[Steelwool]

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?

[Felixthecat]

The Complete guide to Sick Plants,pH, and Pest troubles! - International Cannagraphic Magazine Forums (http://www.icmag.com/ic/showthread.php?t=11688)

check this shit out light bleach is on the bottom page just scroll down

they say only way to fix it is to move light away

[Dutch Pimp]

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.

[Steelwool]

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!

[Dutch Pimp]

It was just so sudden it freaked me out. Thanks!

yeah...it 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.

[jamessr]

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

[EvilCartman]

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

Not. :tin foil hat:

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

[Dutch Pimp]

I read something about the bleaching is caused by the mercury leaking out of the bulb.:wtf: Could this be a fact or not?
don't look past the obvious...the light was too close...:cool:

[Dutch Pimp]

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 OK...so far...we'll see what happens next?