HST

[Rezinator]

Zandor,

If you happen to recheck here, could you please weigh in on this apparent
burn issue?

Is this coated masonite reflectivity issue going to require me to
temp extract plant (mother) from box and give cabinet some flat white paint?

Orrrrrrrr... am I okay so long as foliage is tied in so's not to touch walls.

Could I should I "flat" paint cab tomorrow (Sunday)? Else should I play safe...

Wait a few more recovery days?

Or could I repaint cabinet asap, along with lopping off lower branches?

Thanks, Z. or anybody...

[Rezinator]

Zandor,

Solution... if it was/is indeed a hotspot/burn/reflectivity problem.

Back panel is only panel attached permantly to carcass.

Will paint other walls with flat white.

For Back Wall I will tape in some sheets of 11x17 bond paper.

...and carry on with taking the clones.

tks in advance to one 'n all

[Marc Benson]

I just can't believe that so much heat was absorbed by that back panel that it fried those leaves like that. And as far as it being so reflective that it burned them I don't believe that either. Fluoros just arren't that hot to make surrounding areas so hot and especially as far away as you have them. I've got leaves laying right on the mylar with 43 watt fluoros right next to it and they don't even begin to burn. And from what HD suggested in a different thread, burning from a reflective surface is not something you have to worry much about from CFL's. HID's yes.

Also I see that almost all the leaf tips are burnt. From what I understand that suggests that you're maxed out and a little over the max ferts the plant can handle. So you might want to back off ferts a little.

[Joel]

I think it could be a burn because I too use to grow under fluoro's. I had a bit of a burn once when I first put in my warm white 4ft tubes into all the ballast's, but that was because I was stupid enough to think it wouldnt get the warm.

peace `Joel

[Marc Benson]

I think it could be a burn because I too use to grow under fluoro's. I had a bit of a burn once when I first put in my warm white 4ft tubes into all the ballast's, but that was because I was stupid enough to think it wouldnt get the warm.

peace `Joel

Of course vegetation will fry if you touch the bulb, but this isn't touching the bulb. It's touching the back of the box. Which means it'd have to almost be getting as hot as the bulb. No way.

[Rezinator]

Also I see that almost all the leaf tips are burnt. From what I understand that suggests that you're maxed out and a little over the max ferts the plant can handle. So you might want to back off ferts a little. - MB

I think it could be a burn because I too use to grow under fluoro's. I had a bit of a burn once when I first put in my warm white 4ft tubes into all the ballast's, but that was because I was stupid enough to think it wouldnt get the warm.

Guys,

Tks for input. Not sure but I think Lumen burn probably does not have to have real "heat" to it. just a convergence at some point with no motion.

Was thinking prolly a combo of really strong reflection from front wall panel laying in on top of direct light from bulb. PLUSSSSS... the fact by leaf leaning on the wall, it was stationary over-night, fan wasn't
able to keep it fluttering enough.

Anyway. Panic is over. Won't have to extract and replace plant in order to paint. All panels except back snap on/off - top just drops into place - As for the back panel I taped up some sheets of white 20lb bond paper.

Also reworked the growth tips to get everything more level and dropped lights a couple inches.

.................................................. ...............

Next issue if anybody can hang in a sec, ....Fans.

Not much room to work with. Read that with good negative draw from exhaust I won't need these pc fans for cabinet air intake. So want to array the four fans on a bar and hang them as a unit from either end with strings so they can be adjusted with growth.

Question here is. whether they're intense enough. In test position shown, they don't penetrate the canopy all the way.

Posted a 2 meg MOV file if anybody want's to get a brain cramp.
Click Here

Pic attached is how canopy looks after some grooming.

I think the pc fans will work if positioned okay but check the movie - you can barely see leaves fluttering - or is thems leafs MB - lol - but maybe I'm better off with way more motion. Like a category 2 or so? Yeah. That's it. I'll get FEMA and the Army Corp to come in and do an assessment. Just can't get find enough details to worry about y'know?

Zandor. Any ready links to a lumen burn essay appreciated.

Joel, thanks. O'course it is we're "stupid", just "not as informed of practiced". In my old age I begin to understand why job ads always say they want experience. But I say hey I can phuck up every bit as good as the next guy. Which almost never works....ROTFL.

So here I go to become SCROGGing magnate extraordinaire.

[Rezinator]

Try this correction to the above link to a 2 meg MOV file of leaves under some computer fans. Try this instead - then click link on page.

[Rezinator]

Harddon,

Re: Fans. Turned mov file into a mpeg. 3 megs. Really could use serious advice on breeze. Guess same thing would hold true for colas as it does for seedlings. The more they endure, the more of their own weight they will support??

MB,

Meant to say your suggested configuration of three bulbs on each side had been preference til I got stuck with 15" depth of cab. Got the triplette fixtures for like $7 a piece. Thinking on HD's free hanging socket idea.... but then... perhaps Santii will drop off the HPS or HID if this set up never flies.

All in all no space here to clone plus veg and flower clones plus keep mom so keeps dem cards n lettas comin in, peeps.

Back at it...

[Marc Benson]

So what happened to the Stanley fan you scored? Use that instead of the computer fans. My plants are constantly moving. Pretty much a whirl wind in there but they aren't being jostled a lot. But all leaves are moving...some very little but you can see there's air movement. I've got one fan on the shelf the plants are on blowing up and bouncing off the back wall and another hanging top of canopy high blowing out the door (door is open a little). Then I have another fan outside the area blowing the cooler air from floor level into the room.

"Lumen burn"...that's a new phrase. Did some searches and can't even find one reference to "lumen burn". A lumen is defined as "the amount of light a candle will cast on a one square foot area from one foot away". So it isn't lumens you should be worried about with CFL's. And if those are 43 watt CFL's then you're only putting out a little over 15,000 lumens, which is low for the size of the grow area you have and for sure isn't making the surrounding materials so hot they're burning the leaves (leafs).

So what is your fertilizer schedule? To me that might suggest why the tips of the leaves are all burnt.

[HARDDON]

Rez....

That looks definately like hot burn, no question about it.

That board you have can indeed absorb a trmendous amount of heat from CFLs. Enuff to do that to the leaves as well. Thats why I like them actually....They absorb, rather than reflect the heat.

However, if your temps are now in the 90's you're gonna have a hermie on your hands if you dont do something.

Hanging the lights free style will fix the burn issues...

You are using a computer fan(s)? Sorry but that wont work.

They gotta go right now. You need some real fans. Than fan that I have is the same one you have. You need to use something stong like that.

Your plants have developed a nice stem, it is no longer essential that you have a fan blowing ON the plants. You now need to focus on the space between the plant tops and the light bottoms.

That area must be constantly cleared out and the hot air REMOVED and cooler fresh air must be brought IN.

In watching your, movie I do see some nice movement on the front leaves but not much on the rear leaves.....Stronger fans!!!!

One final thought... I notice also with the positioning of the fans..you appear to have created a "DOWN DRAFT" by having the fans higher than the canopy surface you are trying to cool.

It is quite likely the heat is being drawn downwards becasue of the cirulation issues you now have.

You need to drop the level of the fans, and or.....position to they blow the hot air up and away from the canopy. Again, There is really no mandatory reason now for air blowing on the leaves....the wind, environment however must be redirected...UPWARDS.

You are fanning the surface from the side......to the back wall. This is almost useless.

One big strong fan blowing from the end to end style would better suit your layout.

Hope I could help.