Feedback/Opinions Required - Meijui 240w UV+IR

[Q9550]

Hi All,

Looking to get a new light for my recently purchased tent.

I have a 2x4 Mars tent and currently running a ModuGrow 90w + 2x 30 ModuGrow diy boards.

Looking to upgrade to a new QB from Meijiu and have been offered a light at a good price I think.

https://www.alibaba.com/product-detail/Meijiu-Qb288-Lm301B-288-Board-240W_1600273410022.html?spm=a2700.12243863.0.0.117c3e5fUPT0w8

Looking for any input or advice regarding this light, I can get it with shipping for $176

Any concerns or am I over thinking this? lol

Kind Regards

[PsyCLown]

A friend got one, although the power supply packed up within a year of use and good luck getting it swapped out.

Otherwise his is good - but it is just a plain Meiju board, no UV or IR on his.

[Q9550]

Shot for the reply bro.

Is the UV + IR required? I can always just do the simple board with added 66nm

[Prom]

I use 3000k with 660nm QBs.. and happy so far ^^

[Q9550]

16 minutes ago, Prom said:

I use 3000k with 660nm QBs.. and happy so far ^^

Did you import from Alibaba or bought locally?

[Prom]

I bought my TS3000s local.. all my QBs i imported over Aliexpress or Alibaba 

[CreX]

1 hour ago, Q9550 said:

Shot for the reply bro.

Is the UV + IR required? I can always just do the simple board with added 66nm

Unfortunately, science says that LEDs do not emit UV-B radiation which is beneficial to plants and most living things in moderation, and only output moderate UV-A light which isnt as useful to plants, and absolutely zero UV-C which is the dangerous UV spectrum. UV is best supplied using additional supplemental flourecent tubes designed to output UV-B. so the UV diodes are a small waste as technology isnt there yet.

and the IR is useful for flowering plants who use large amounts of red light to grow... the red also increases vertical growth which can be good or it can be bad if you arent aware of this fact.

all in all, its better to have them than not have them - but you dont neeeeeed them

[PsyCLown]

2 hours ago, Q9550 said:

Shot for the reply bro.

Is the UV + IR required? I can always just do the simple board with added 66nm

UV from LED is a waste for cannabis (for now at least).

IR is often classified as 730nm and not 760nm+

The 660nm + 730nm leads to the Emerson effect

 

Not needed. Can be nice to have if you want though.

[Q9550]

2 hours ago, CreX said:

Unfortunately, science says that LEDs do not emit UV-B radiation which is beneficial to plants and most living things in moderation, and only output moderate UV-A light which isnt as useful to plants, and absolutely zero UV-C which is the dangerous UV spectrum. UV is best supplied using additional supplemental flourecent tubes designed to output UV-B. so the UV diodes are a small waste as technology isnt there yet.

and the IR is useful for flowering plants who use large amounts of red light to grow... the red also increases vertical growth which can be good or it can be bad if you arent aware of this fact.

all in all, its better to have them than not have them - but you dont neeeeeed them

Bro! Thank you for this, exactly the kind of info I was looking for. I think they caught me with the marketing tactics lol

I am happy to go with the normal boards + 660nm

Would have been nice to have, but if its not going to make much difference then would rather get the extra 660nm pieces.

 

[PsyCLown]

14 hours ago, Q9550 said:

Bro! Thank you for this, exactly the kind of info I was looking for. I think they caught me with the marketing tactics lol

I am happy to go with the normal boards + 660nm

Would have been nice to have, but if its not going to make much difference then would rather get the extra 660nm pieces.

 

This is just going to boost the red a bit.

It would be more beneficial if you were to get additional 660 + 730 diodes. This would boost red and photosynthesis.

[Q9550]

On 8/31/2021 at 8:37 AM, PsyCLown said:

This is just going to boost the red a bit.

It would be more beneficial if you were to get additional 660 + 730 diodes. This would boost red and photosynthesis.

Thanks bro, this got me doing a bit more research last night on 660nm + 730nm

From what I gather the 660nm helps boost red for flowering and the 730nm helps wake up or put the plants to sleep faster.

730nm should be used 10/15mins before and after the mains lights switch for the sleep/wake up effect.

If 660nm + 730nm is used together then this help with photosynthesis and also reduces flowering times.

Please correct me if I am wrong, there is a ton of info out there with so many varying opinions.

 

My issue now is that I cannot get the boards with only 660nm + 730nm

If I want the 730nm diodes I will have to go with the original board I posted.

This has reduced 660nm diodes:

https://www.alibaba.com/product-detail/Meijiu-Qb288-Lm301B-288-Board-240W_1600273410022.html?spm=a2700.12243863.0.0.117c3e5fUPT0w8
 

VS

https://meijiu.en.alibaba.com/product/1600204627439-900283355/Meijiu_Daisy_Chain_Lm301b_Lm301h_Veg_Diy_qb288_qb_288_Board_240w_240_watt_Samsung_pcb_pcba_ir_5000k_sf2000_Meiju_Led_Grow_Light.html?spm=a2700.shop_plgr.41413.12.5a0f621dzVWDWr

 

This is all still so very confusing, never had these issues with HPS LOL

[PsyCLown]

Thanks bro, this got me doing a bit more research last night on 660nm + 730nm
From what I gather the 660nm helps boost red for flowering and the 730nm helps wake up or put the plants to sleep faster.
730nm should be used 10/15mins before and after the mains lights switch for the sleep/wake up effect.
If 660nm + 730nm is used together then this help with photosynthesis and also reduces flowering times.
Please correct me if I am wrong, there is a ton of info out there with so many varying opinions.
 
My issue now is that I cannot get the boards with only 660nm + 730nm
If I want the 730nm diodes I will have to go with the original board I posted.
This has reduced 660nm diodes:
https://www.alibaba.com/product-detail/Meijiu-Qb288-Lm301B-288-Board-240W_1600273410022.html?spm=a2700.12243863.0.0.117c3e5fUPT0w8
 
VS
https://meijiu.en.alibaba.com/product/1600204627439-900283355/Meijiu_Daisy_Chain_Lm301b_Lm301h_Veg_Diy_qb288_qb_288_Board_240w_240_watt_Samsung_pcb_pcba_ir_5000k_sf2000_Meiju_Led_Grow_Light.html?spm=a2700.shop_plgr.41413.12.5a0f621dzVWDWr

 
This is all still so very confusing, never had these issues with HPS LOL

There are manufacturers who stock these boards and local suppliers who stock boards with 660nm and 730nm.

Really upto you whether you want to go this route or not. Plain 301b diodes work great too without any additional diodes.

Sent from my Redmi Note 7 Pro using Tapatalk

[Q9550]

Howsit all,

Just wanted to say a big thank you to all who responded and provided some very valuable information 

I ended up going with a KingBrite J series 240w LM301H with UV+IR (https://tinyurl.com/j240wUVIR), yeah I know it was not even part of the options above lol

Managed to pick it up for USD185 incl shipping, which worked out to about R2600 when I placed the order.

I just felt with the Meijiu boards there was not enough 660nm and UV+IR diodes. The KingBrite has 136pcs 660nm, 8pcs UR and 8pcs IR

Will post back when the light arrives in October.

 

Edited September 17, 2021 by Q9550

[Pandy]

Hey man i know this was a while back, did you manage to get your light?

[Q9550]

On 3/4/2022 at 1:19 PM, Pandy said:

Hey man i know this was a while back, did you manage to get your light?

Sup bro,

I know the reply is way overdue lol but yes I did receive the light. It was shipped to me quite quickly. I didn't get to use it much as i stopped growing for a while due to personal circumstances. Trying to get back into it slowly now again 

[Ill_Evan]

3 hours ago, Q9550 said:

Trying to get back into it slowly now again 

[Ill_Evan]

Heads up. Meiju have opened up an office in the Western Cape and they don't look too bad at all. A few products in particular catch my eye. For somebody just starting out I'd point to this 240W.

I personally have been slowly looking and waiting for what would inevitably replace my QBs when their time comes and I would opt for the 650W below. I've got another year or so I rate before I think I should start testing/replacing my first LEDs.

[ORGANinc.]

Wow this is something, this is the one I got, very happy with it. https://www.meijiu-za.com/products/1988-电位器款-1

They are decently competitive. 
cheers for sharing

[DesignatedDave]

If I hadn't just put my order in for 2x sunplus sundro 700w lights, I would actually consider these.

 

 

[CoolJ]

On 9/22/2022 at 2:01 PM, Ill_Evan said:

Heads up. Meiju have opened up an office in the Western Cape and they don't look too bad at all. A few products in particular catch my eye. For somebody just starting out I'd point to this 240W.

I personally have been slowly looking and waiting for what would inevitably replace my QBs when their time comes and I would opt for the 650W below. I've got another year or so I rate before I think I should start testing/replacing my first LEDs.

I would of thought the prices would be abit better seeing as lots of guys importing them for less.

Prices seem very similar to the local market. 

[Ill_Evan]

22 minutes ago, CoolJ said:

I would of thought the prices would be abit better seeing as lots of guys importing them for less.

Prices seem very similar to the local market. 

Let's see them links, King! Show us the guys importing for less, why you holding out on us bruh? 

[CoolJ]

22 minutes ago, Ill_Evan said:

Let's see them links, King! Show us the guys importing for less, why you holding out on us bruh? 

Just from Alibaba, without shipping and customs it cost about R2400 from them. My last import I paid about R1100 shipping and tax. You can save a few bucks if you want to go that route but them being here gives people the ease of mind. 

Also looking at the Nanolux 630w feature which is 13k seen it for about 10k on sale aswell. 

Their prices are not bad I thought it would just be abit better but everyone needs to eat! 

[Prom]

There is one mayor advantage ordering from China... Warranty! 

I ordered a 200ah 12v battery from ecodepo.co.za ... support local. Battery gave up after 15 months and I can't claim warranty and have to declare it a loss as ecodepo got liquidated in the meantime.

The factory in China producing 10'000 of those batteries a day will not so easily disappear.. South African order re-heaters most likely will be gone in 1-2 years... and with them your warranty. 

I bought 16 x 288 QBs in February this year, they cost me in total about 25k Rand (boards (Alibaba) and drivers (digikey, free shipping)), plus customs). 3.1K per 2 QBs or 240 watts... about half of what they charge in this country.. ordering the material from China/US.. i love to support local.. but sadly in certain cases choosing local is a clear disadvantage.