King Cob Led grow light

An AgroMax is too big for my box. How much wattage of UV do you have per square ft? Many things can cause tip burns, it's hard to tell what the problem really is. Sour Wreck says plants start to wither and wrinkle on top.
GLR, you are so kind, but you got me wrong. The 425+660 or 1750k would be supplemental, I have a Cob alredy. And the deeper red is about the wide spectrum red leds, the waves over 660. As I know they can cause stretching. I know there is no 680nm led.

Old ninja said:

An AgroMax is too big for my box. How much wattage of UV do you have per square ft? Many things can cause tip burns, it's hard to tell what the problem really is. Sour Wreck says plants start to wither and wrinkle on top.
GLR, you are so kind, but you got me wrong. The 425+660 or 1750k would be supplemental, I have a Cob alredy. And the deeper red is about the wide spectrum red leds, the waves over 660. As I know they can cause stretching. I know there is no 680nm led.

Click to expand...

I've calculated with 30-35w/ft² + 10% UVB.

The light I currently building will deliver up to 400-450w of white LED (3000°K /mix of CRI 80 + 90) and roughly 40w UV-B/A (39w T5H0, because T5 is much more efficient as T8/T12 or MH).
Since it will be sold later, I have designed it for a 4x4 'tent.

I've also a small 3ft² area which is more or less for my own care.
This relatively small area have about 100w white LEDs (supplemented with 425 and 660nm) and a 11w T5HO 1U tube with G23 socket.


It's pretty easy with those tubes, because they use the same drivers as normal T5 tubes. They are available from 8-80w and in special sizes, but also with built-in electronics and e27/e14 socket.



The only thing to watch out for is that it is suitable for desert reptiles like bearded dragons.

Randomblame said:

I've also a small 3ft² area

Click to expand...

How much can you grow on 3ft²? My box is similar. Do you have one plant at a time or more? How can you maximize the yield/area? I have a good light, but no CO2. And lots of LST, but what else? I don't want to do SoG.

Randomblame said:

I've calculated with 30-35w/ft² + 10% UVB.

The light I currently building will deliver up to 400-450w of white LED (3000°K /mix of CRI 80 + 90) and roughly 40w UV-B/A (39w T5H0, because T5 is much more efficient as T8/T12 or MH).
Since it will be sold later, I have designed it for a 4x4 'tent.

I've also a small 3ft² area which is more or less for my own care.
This relatively small area have about 100w white LEDs (supplemented with 425 and 660nm) and a 11w T5HO 1U tube with G23 socket.
View attachment 4093638

It's pretty easy with those tubes, because they use the same drivers as normal T5 tubes. They are available from 8-80w and in special sizes, but also with built-in electronics and e27/e14 socket.

View attachment 4093640

The only thing to watch out for is that it is suitable for desert reptiles like bearded dragons.

Click to expand...

I prefer the shaved ones......

I could maximize the yield to 50g/ft² with a heavy yielder like BlueDream, but usually I get 3-4 zips which lasts me until the next gals are finished. I do not pay much attention to my g/w numbers I'm more focussed on "medical benefits".
I need a pain killer because of my old bones, lol!

Moflow said:

I prefer the shaved ones......

Click to expand...

to kiss them..?
Even though I prefer shaved girls as well ... a dragon without spikes is a no-go, lol!

Something like this?

A nice even canopy with a purple flowerhead......
Lol

@Randomblame when you going to post some pics of that new light your building? I seen a mock up of the tube you had about a month ago. Any progress?

Buck5050 said:

@Randomblame when you going to post some pics of that new light your building? I seen a mock up of the tube you had about a month ago. Any progress?

Click to expand...

Hey mate!
When it's done, I'll post as promised a few pictures from the creation process. But I'm still waiting for 10 Cree XP-E far-red/730nm diodes, of which I want to use 6 for a far-red trigger for EOD treatment.

The red marked spots are for the XPE's, each of the blue marked spots gets a V18c/3k/CRI90 and each of the smaller U-channels gets 2 560mm stripes each. Yes, I know I should have taken 1120mm, but the Arrow deal was just too good...
In addition, I need 560mm strip anyway for my 3ft² chamber, so I'll wire the 20 strips in 10s2p and add them to the HLG-240H-C1050B. The eight V18c's are running on an HLG-120H-C500B. The center reflector gets an 39w UVB tube.


In the driver housing sit the two HLG drivers, a 5w/300mA driver for the XP-E's, the driver for the UV-B tube, a 12v power source for the two AV meters, and 2 Sonoff's (a dual and a basic). User interface has 2 AV-meters, the two dimmers, two on/off switches and the input-socket with mainswitch. Sonoff timer on/off times for LEDs, COB's, UVB and IR trigger are all controlled via smartphone app. Later I'll switch to alternate sonoff firmware called Tasmota and Homeassistent.ui to run on my own private rasPi server. I've heared from server crashes in china and disco-like blinking lights at night and with an own server I would be completely independend from any china located server.



BTW,
it was a real PITA to insert this much rubber grommets properly into the wire thru holes. Takes me almost 3 hours to drill all the holes and push in the shitty grommets.