Another Cree CXA3070 DIY Thread

captainmorgan said:
Cannabis is a short day plant and the flowering is controlled by the length of darkness,the longer the dark period the higher the flowering hormone gets. Starting with 730nm at 12/12 pushes the plant into flower harder,at 12/12 without 730nm the plant thinks it's only getting 10 hrs of darkness indoors. Outdoors where the plant gets 730nm naturally,flowering usually starts at 14/10. Once flowering is well underway you increase your lights on to increase the amount of energy the plants can absorb to build flowers. Then at the end you increase the dark period to push the plants to flower harder. Your just manipulating the plants hormone levels as I understand it.
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Thanks for the insight into your exotic diabolical lighting scheme ;) Is this something you tried and liked, or have there been studies on your particular schedule? Keep raising the bar brother!
 
churchhaze said:
That's how I flatten my water stones.

I've heard of older mechanics resurfacing heads the same way while doing quick head gasket jobs. (just putting a big piece of sandpaper on a flat surface, and moving the whole head around on top)
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Its also how you make a surface plate flat. When I say flat, I mean to the micron flat. You use two plates and rub them together. Each stone makes the other flatter with every stroke, until they become as close to perfect as possible. Or your arms get tired, whichever comes first.
 
Red1966 said:
If you want to get them FLAT, don't use a palm sander. Place the paper on a flat surface and slide the heat sink back and forth on top of it. Be sure the surface underneath is clean. Any little bit of crap under it will gouge the heat sink and/or rip the paper. Wet sanding is the way to go.
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I soak a whole sheet of sandpaper on the sink and stick it to my bathroom mirror. I then dip the heat sink in the water from the tap and slide it on the paper, the water and aluminum dust just drip down the mirror. I Repeat this with finer sandpaper until I'm happy.

the water holds the paper to the mirror
 
epicfail said:
I soak a whole sheet of sandpaper on the sink and stick it to my bathroom mirror. I then dip the heat sink in the water from the tap and slide it on the paper, the water and aluminum dust just drip down the mirror. I Repeat this with finer sandpaper until I'm happy.

the water holds the paper to the mirror
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Glass is usually very flat. I bet you're either unmarried, or have a very angry wife.
 
RedCarpetMatches said:
Thanks for the insight into your exotic diabolical lighting scheme ;) Is this something you tried and liked, or have there been studies on your particular schedule? Keep raising the bar brother!
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I bought my first one like 1 1/2 years ago because of a thread that I read here,I think Spliff started it but I can't find it. I really followed the suggestions of Bill at growlightsource.com who makes them and read the material that he links to on his site,just made sense to me.

Found it.

https://www.rollitup.org/t/730nm-flower-initiator-vs-blue-dream-outdoors.554659/
 
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Very exciting info! Why are these 730 LEDs so expensive?!

I remember reading a thread a while back about a guy who was using IR (heat) before lights-on to signal the start of the day to the plants. He said that it worked well - doing what - I can't remember - yield, flower, potency...?

I love the idea of a bleeding edge experimental growing source - oh wait - it is here!

Cheers,
Mo
 
It's day 5 and I may have under estimated these short veg plants and the COB's,they are blowing up. Did a little lower clean up and gave them a quart of worm castings for a top dress,they're in a happy frog and ocean forest mix instead of my homemade soil and they're in 5 gal instead of 7's because of the short veg. First run with the COB's I only had four so I added a assortment of other lights to get some more watts on them,and I made the switch in lights like 3 weeks in,the plants were out of control and I jambed a screen over them,not a ideal grow but got a decent yield. Now it's six COB's,3 over each plant and just the flower initiator,UV to be added soon and the plants are really growing like crazy. This may turn into a nice yield if they keep this up.
 

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I'm really thinking I will try a vertical scrog with these COB's. My tentative plan would be adding reflectors to six COB's and putting a 3.5'x3' screen on the back wall of a 3'x3' tent. I would hang the COB's, 3 to a row and one row above the other with around a 30 degree tilt in the COB's towards the wall. It's 10.5 sq/ft of screen and 312 watts of COB's for just under 30 watts per sq/ft of screen. Any thoughts?
 
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