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3500K 8 cob 3590 light 1.4 amps

Ichabod Crane

Well-known member
Veteran
If there is enough interest I was thinking of doing a thread on the building of this light.





What you see above in the first picture is the bottom of the light. The second picture is the top of the light. The next picture is the light on as view from the top.



Finally you see in the last picture the controls of the light.



To the left are two switches that turn one side on or off. Each switch controls four cobs. To the right are dimmer switches that also control four cobs from one side. So I can turn one side off and dim the other, or turn both sides off, or dim both sides at the same time.

The box on the left also has two c-14 outlets that accept c-13 plugs like on a ballast. There is also a regular 110 outlet.

The two blue boxes in the center are the drivers. Each is a 1.4 amp LSD driver. They run four 3590 cobs at 49 watts. If you look at these drivers you will see that I marked a circle with a line threw it. These drivers were made wrong and wont dim. But they work fine at full power.

It will do a area 2.5x5 feet at about the same light intensity as a DE fixture will. But it covers only half the area. Two of these will cover a 5x5 foot area withe the same light intensity as a 1000 watt DE. But this light will do it with less heat and only about 850 watts. It does not require a 12 foot ceiling to use. It only needs to be about 18 inches from your plants.

If you guys are interested let me know.

Materials needed for this light.

qty item
100 M3 x 10 mm screws
1 3/4" x 7" x 1/8 piece of aluminum (drill jig)
1bx Pan head screws #6 x 7/16"

100 M3 x 8 mm screws
8 3590 cob holders
8 Heat sinks

4 46 inch tracks
4 48 inch track covers
1 Can of primer

1 Can flat black semigloss paint
100 #6 x 1/2" bolts and nuts
100 1/8" x 1/4" aluminum rivets

100 #8 washers
4 1.5" x 20.25" x 1/8" flat aluminum
2 1" x 11" x 1/8" flat aluminum

2 1" x 8.5" x 1/8" flat aluminum
2 4" x 4" x 2" junction box
6 PG9 gland

2 C-14 outlet
1 110 push in outlet
2 1/4" shaft knob

2 100k potentiometer
2 on/off switches
4 1/4" x 5" eyebolts with 3 nuts each

2 1.4 amp drivers
2 10k ohm resisters
10 ft black 16 gauge stranded wire

10 ft white 16 gauge stranded wire
10 ft green 16 gauge stranded wire
1 roll electrical solder

1 liquid tape or electrical tape
 

Dion

Active member
I'm interested to know why u don't spring for an extra 2 cobs seen as those drivers will run 5

Growmua5 has a vid of this assembly but more diy porn is always appreciated.

Nice build
 

wildgrow

, The Ghost of
Veteran
Id like to see it Ich. Thinking of going led but Id like to keep both nuts.

That frame is a lot nicer than the solid slab of heat sink.

1000w equiv for 850w - what % of full power are you driving each at?
 

Ichabod Crane

Well-known member
Veteran
I'm interested to know why u don't spring for an extra 2 cobs seen as those drivers will run 5

Growmua5 has a vid of this assembly but more diy porn is always appreciated.

Nice build

This is a 200 watt driver not 250. I got it at Pacific Light Concepts. I tried to bury the wires in the frame as much as possible to keep from pulling them when I move the light around. So not exactly like Growmau5 build bug his standard set up.

Id like to see it Ich. Thinking of going led but Id like to keep both nuts.

That frame is a lot nicer than the solid slab of heat sink.

1000w equiv for 850w - what % of full power are you driving each at?

It is really a little stronger than 1000 watt equiv by about 100 watts. Should kick the shit out of a DE setup. I have it set up with diffusers to help spread the light. That will be much better than a DE which has only one point of light. This has with a second will have 16 points of diffused light that is slightly more intense. But I have not run it yet so just stating what other say.

Thinking of doing a seed run with Megayields Dirty Girlscout seeds and some Agent Orange seeds.
 
F

fatalxerror

What is total cost for materials for this light? What is the wattage it pulls from wall? Have you done any lumen or par tests?
 

Ichabod Crane

Well-known member
Veteran
What is total cost for materials for this light? What is the wattage it pulls from wall? Have you done any lumen or par tests?
I did not keep a record of cost. The cobs, drivers, diffusers, cob holders, reflectors, reflector holders, and heat sinks cost about $1350 for two of these lights. But the other stuff was a mix of what was on hand and some purchased. My guess is around $850 for what is shown and $1700 for a DE equiv.

I have not run a killowatt meter on it. But based on other builds on the net it should be about 425 watts per light as shown and 850 for two.

The PPFD should run about 792. This is using Supras numbers of 4 cobs run at 1.4 amps getting 824 in 6 square feet.
 

Ichabod Crane

Well-known member
Veteran
It looks like the frame is the toughest to build. A parts list would be nice.

It is made from 8 foot pieces of half inch c channel and inch and a half flat stock and inch flat stock. If enough people want I will give all the cut lengths and parts as I build it.
 

megayields

Grower of Connoisseur herb's.
ICMag Donor
Veteran
RE> It is not really that hard to make if you can run a drill and use a saw.

That's a tall order for some of us....definitely pulling up a chair for this..let the learning begin!:tiphat:
 

eyes

Active member
Veteran
Pretty nice setup u got there. I think anytime a tutorial is offered most people would be interested.
 

Ichabod Crane

Well-known member
Veteran
RE> It is not really that hard to make if you can run a drill and use a saw.

That's a tall order for some of us....definitely pulling up a chair for this..let the learning begin!:tiphat:

Hey buddy it takes six tickets to see this freak and you got to be this tall. How did you get in here?

Pretty nice setup u got there. I think anytime a tutorial is offered most people would be interested.

Thanks. I think it turned out ok. A few things I will change but I think I will start the build tomorrow.
 

packerfan79

Active member
Veteran
I am definitely interested in a build diy thread. I am working on plans for a new build out. I may be picking your brain Mr Crane, if you don't mind. I have followed your threads and I am always impressed with your work.
 

Ichabod Crane

Well-known member
Veteran
I am definitely interested in a build diy thread. I am working on plans for a new build out. I may be picking your brain Mr Crane, if you don't mind. I have followed your threads and I am always impressed with your work.

I will help where I can. This LED thing is new to me. Like horizontal grows are. Well I have a lot more experience with flat grows have done one before. Time consuming grow that took 13 weeks you know.
 

packerfan79

Active member
Veteran
Yeah 13 weeks is kinda long. I would run into heat problems at the end of the 2nd round if I ran that long. I am doing a shed build soon. Now you got me thinking I might wait to buy my equipment and see how you do with your leds.I was thinking of a stadium with 6 600s with like 7 days veg like 200 plants. I will also be monocropping bodhi s black triangle, not the best yeilds but without a doubt the best bud I have grown. Better than elementals true og, the true has always been my favorite until now.
 

Ichabod Crane

Well-known member
Veteran
Yeah 13 weeks is kinda long. I would run into heat problems at the end of the 2nd round if I ran that long. I am doing a shed build soon. Now you got me thinking I might wait to buy my equipment and see how you do with your leds.I was thinking of a stadium with 6 600s with like 7 days veg like 200 plants. I will also be monocropping bodhi s black triangle, not the best yeilds but without a doubt the best bud I have grown. Better than elementals true og, the true has always been my favorite until now.

Dont know anything about those two strains.

Sorry to clutter up your thread, stuff like this is why I have a hard time deciding how to grow.

Hard to clutter when I have just started.
 

usda101

Active member
Glad i got a good seat for the Show . Been studying and salvaging parts for my build , This will help greatly .
 
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