Here is my LED spectrum.... please give me some advices

[神秘人]

660nm(red)10粒， 650nm(red)10粒， 630nm(red)100粒， 610nm(orange) 10粒， 460nm(blue)10粒， 450nm(blue) 10粒，440nm(blue)2粒， 430nm(violet)2粒， 2800K(white)10粒， 730nm(IR)2粒，

 

[pirg420]

loller.

 

[神秘人]

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loller.

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[Mechmike]

660nm(red)10粒， 650nm(red)10粒， 630nm(red)100粒， 610nm(orange) 10粒， 460nm(blue)10粒， 450nm(blue) 10粒，440nm(blue)2粒， 430nm(violet)2粒， 2800K(white)10粒， 730nm(IR)2粒，

That would work but white cobs provide every color your plants need. They are also more efficient and less expense to build.
My favorite is the Bridgelux Vero 18 but there are many other options available in cob emitters.

 

[神秘人]

That would work but white cobs provide every color your plants need. They are also more efficient and less expense to build.
My favorite is the Bridgelux Vero 18 but there are many other options available in cob emitters.

Could you please help me to adjust my spectrum or just give me one which you think better, im in china and i connect with a led company where can customize the led, they are waiting for my spectrum but im a starter......... thanks !!!

 

[Mechmike]

Could you please help me to adjust my spectrum or just give me one which you think better, im in china and i connect with a led company where can customize the led, they are waiting for my spectrum but im a starter......... thanks !!!

The spectrum you first posted will work fine. As far as I know, no Chinese led grow light manufacturer uses anything but lower quality Epistar emitters. Those are comparatively inefficient and have a much shorter life span. I was just pointing out that you could use less power and get better yields with high quality cob emitters. Most are made in China and would be less costly there than any other location.

 

[神秘人]

The spectrum you first posted will work fine. As far as I know, no Chinese led grow light manufacturer uses anything but lower quality Epistar emitters. Those are comparatively inefficient and have a much shorter life span. I was just pointing out that you could use less power and get better yields with high quality cob emitters. Most are made in China and would be less costly there than any other location.

thank you so much for your brilliant answer!

 

[神秘人]

The spectrum you first posted will work fine. As far as I know, no Chinese led grow light manufacturer uses anything but lower quality Epistar emitters. Those are comparatively inefficient and have a much shorter life span. I was just pointing out that you could use less power and get better yields with high quality cob emitters. Most are made in China and would be less costly there than any other location.

you are really helpful to me, oh! my teacher! now i found it on chinese ebay and it seems i can make a LED by myself, i have a 4.5 square meter tent and 15 plants, how many led i need to make? what's the watt and should i only buy the white cob??

 

[Mechmike]

you are really helpful to me, oh! my teacher! now i found it on chinese ebay and it seems i can make a LED by myself, i have a 4.5 square meter tent and 15 plants, how many led i need to make? what's the watt and should i only buy the white cob??

The picture is of the type of emitter you should try to avoid if possible. Check out Bridgelux Vero or Cree CXA series. How many emitters will depend on the how you much light you need, the size of emitter you choose and at what amperage you want to drive them. To adequately light 4.5 square meters you will need ~300 watts per square meters or 1300-1500 watts.

 

[az2000]

you are really helpful to me, oh! my teacher! now i found it on chinese ebay and it seems i can make a LED by myself, i have a 4.5 square meter tent and 15 plants, how many led i need to make? what's the watt and should i only buy the white cob??

From what I've read, the epistar/epiled whites aren't very good for growing. I've used the following custom-made epi light:

7% 1x IR 730
60% 9x deep red 660
13% 2x blue 450
White avg 5116k
- 7% 1x white 3350k (3200-3500k)
- 13% 2x white 6000k (5500-6500k)

It worked ok. If you're willing to make your own light, look at the CXA threads in this forum. Also the thread by @REALSTYLES about "Kingbrite Technology." These LEDs (called COB) seem to be more efficient.

 

[神秘人]

The picture is of the type of emitter you should try to avoid if possible. Check out Bridgelux Vero or Cree CXA series. How many emitters will depend on the how you much light you need, the size of emitter you choose and at what amperage you want to drive them. To adequately light 4.5 square meters you will need ~300 watts per square meters or 1300-1500 watts.

how many i should buy?

 

[神秘人]

From what I've read, the epistar/epiled whites aren't very good for growing. I've used the following custom-made epi light:

7% 1x IR 730
60% 9x deep red 660
13% 2x blue 450
White avg 5116k
- 7% 1x white 3350k (3200-3500k)
- 13% 2x white 6000k (5500-6500k)

It worked ok. If you're willing to make your own light, look at the CXA threads in this forum. Also the thread by @REALSTYLES about "Kingbrite Technology." These LEDs (called COB) seem to be more efficient.

thank you for your help !!!

 

[Mechmike]

If you drive the Vero 18 3500k at 1050ma it draws ~30w and produces ~3500 lumens. At that current you would need 50 emitters. You could drive them harder and use less emitters but at a cost to efficiency. Even if they are driven a 2100ma they are still more efficient than what you were about to get. Here is a data sheet for the Vero 18 so you can get an idea of efficiency at different currents.

 

[神秘人]

If you drive the Vero 18 3500k at 1050ma it draws ~30w and produces ~3500 lumens. At that current you would need 50 emitters. You could drive them harder and use less emitters but at a cost to efficiency. Even if they are driven a 2100ma they are still more efficient than what you were about to get. Here is a data sheet for the Vero 18 so you can get an idea of efficiency at different currents.

thanks the help from all, you guys made a chinses feel so warm!

 

[Mechmike]

You're welcome. Happy growing!

 

[REALSTYLES]

It's about the Cree CXB's now even more efficient but not cheap when you buy large heat sinks as well, but cheaper than buying a retail panel.

 

[churchhaze]

I thought the cree stuff came from china! Can't you get a good deal on cxb there? Delivery should be cheaper if it's going from china to china, right?

cxb2530 , cxb3070, cxb3950

80cri, 3000k

The top bins of those 3 models are extremely efficient, even compared to the bridgelux vero and cxa.

Is electricity expensive where you are in china? Cxb are very expensive!! lol

 

[神秘人]

I thought the cree stuff came from china! Can't you get a good deal on cxb there? Delivery should be cheaper if it's going from china to china, right?

cxb2530 , cxb3070, cxb3950

80cri, 3000k

The top bins of those 3 models are extremely efficient, even compared to the bridgelux vero and cxa.

Is electricity expensive where you are in china? Cxb are very expensive!! lol

im in the liaoning province in china, here the electricity is so cheap about 0.5 rmb

 

[神秘人]

I thought the cree stuff came from china! Can't you get a good deal on cxb there? Delivery should be cheaper if it's going from china to china, right?

cxb2530 , cxb3070, cxb3950

80cri, 3000k

The top bins of those 3 models are extremely efficient, even compared to the bridgelux vero and cxa.

Is electricity expensive where you are in china? Cxb are very expensive!! lol

its hard to a normal chinese to buy such stuff you said, because the light company focus on sell their light to you guys, there are a few people sell it on internet and its impossible buy it in a market near me. i spent alot time to talk with the company to makesure the product, now im buying a cob, should i pick up one of cxb2530 , cxb3070, cxb3950 and the parameter is 80cri, 3000k?

 

[churchhaze]

The 80cri 3000k phosphors most white leds use is the best for flowering according to many here.

Look for the top flux bins if you get cxb or even cxa. There are different flux bins for every model and color temperature.