Pictures of your DIY lights - Post your pics!!!

littlejacob

littlejacob

Well-Known Member
[QUOTE="sethimus, post: 12237157, member: 5516170you have a right angled triangle, with the right angle on top, a and b have the same length, as alpha and beta are the same and you know your height h


ta = 90° - alpha
p = hh/tan(alpha)
q = h²/p
c = p + q
a = sqr(c·q)
b = sqr(c² - a²)
u = a + b + c
A = c·h/2[/QUOTE]
Bonjour
Thanks for the fishing lesson but i prefer to go to buy some fish to a good fisherman...like you...!
Sorry but for me it is french...no i mean chinese...lol!
But thanks...
As if i am over medicated...do you believe that 0.5gr of ash and 0.5gr weed per day is a lot?
I have a friend who smoke 5gr weed everyday for pleasure between 5:00 pm and midnight!
I want to learn...what i could use to do it for me...but i have others numbers in my head for now...i just manage some space for this!!!
CU
 
Airwalker16

Airwalker16

Well-Known Member
littlejacob said:
[QUOTE="sethimus, post: 12237157, member: 5516170you have a right angled triangle, with the right angle on top, a and b have the same length, as alpha and beta are the same and you know your height h


ta = 90° - alpha
p = hh/tan(alpha)
q = h²/p
c = p + q
a = sqr(c·q)
b = sqr(c² - a²)
u = a + b + c
A = c·h/2
Click to expand...
Bonjour
Thanks for the fishing lesson but i prefer to go to buy some fish to a good fisherman...like you...!
Sorry but for me it is french...no i mean chinese...lol!
But thanks...
As if i am over medicated...do you believe that 0.5gr of ash and 0.5gr weed per day is a lot?
I have a friend who smoke 5gr weed everyday for pleasure between 5:00 pm and midnight!
I want to learn...what i could use to do it for me...but i have others numbers in my head for now...i just manage some space for this!!!
CU[/QUOTE]
This post confused the hell outta me...
 
sforza

sforza

Well-Known Member
Airwalker16 said:
Bonjour
Thanks for the fishing lesson but i prefer to go to buy some fish to a good fisherman...like you...!
Sorry but for me it is french...no i mean chinese...lol!
But thanks...
As if i am over medicated...do you believe that 0.5gr of ash and 0.5gr weed per day is a lot?
I have a friend who smoke 5gr weed everyday for pleasure between 5:00 pm and midnight!
I want to learn...what i could use to do it for me...but i have others numbers in my head for now...i just manage some space for this!!!
CU
Click to expand...
This post confused the hell outta me...[/QUOTE]
If I were you, I would cut back on the ash and up the consumption of weed.
 
sforza

sforza

Well-Known Member
Speaking of reflectors:

IMG_0701.JPG
IMG_0702.JPG

This was one of my first lights, using a Chinese Purple COB, which I have replaced with Cree CXB3590s and Vero 29s. It is just a cob mounted on a CPU heatsink and fan, but I mounted it up inside a cheap aluminum reflector that I picked up at Walmart of Home Depot. The fan blows down through the heatsink. Mounting it inside the reflector puts more of the light down instead of letting it go sideways and the reflector also profides protection.
 
only1realhigh

only1realhigh

Well-Known Member
The tower was my first LED anything, I just got some insight about them years ago, and finally found a real need for them, so I built the tower with a bit of help and guidance from Positivity a few years back.

I know I have the LED layout a bit bunched up in the red/ deep red LED's. Getting it all together and wired up was a task with all of them, and so I did keep some to close for the easy of wiring them up.

If the tower is only 8.5 inch's away from the plant material, I did not see the need for reflectors or the secondary lens, but I do wonder about a even disbursement of the light spectrum to the plant.
So do I use something or just go bare as it is ??????????any help is welcomed on this matter....
 
wietefras

wietefras

Well-Known Member
tinyplantas said:
@wietefras Great work...I'm curious where to find the holders for the cree with the wire inputs... i have no idea what they are even called - sorry for being a noob.
Click to expand...
Thanks.

I used these: http://www.digikey.nl/product-search/en?keywords=A107375-ND

It's all I could find on short notice at the time. Not a very easy design to use though since the two halves need to be very accurately positioned to fit snugly around the COB.

Next time I will use the IDEAL Chip-Lok holders instead.
 
tinyplantas

tinyplantas

Active Member
wietefras said:
Some pictures of my led fixture with 8xCBX3070 3000K AB bin Cree COBs. It's run at 1.4A (400W) using the standard Mean Well HLG-185H-C1400B.

The 8 COBs are distributed over a 1m2 surface (frame itself is about 80cm):
View attachment 3571643
Click to expand...
Where can I find aluminum framing like you've used here?

I hope you don't mind the questions as I am putting together my first build and I love your design. Feel free to weigh in on my thread here.
 
Airwalker16

Airwalker16

Well-Known Member
It's amazing how expensive heat sinks are. For 3 - 36"(5.886"W), its $220, shipping included.I've searched high and low. It truly seems heatsinkusa.com is the only place to get multiple profile options with custom lengths.
 
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