Is this even possible? 650w Meijiu Bar Light. 3.0 umol/J. LM301H and Osram. 1950 PPFD!!!!

[Mr_Manny_D]

I have two Meijiu Majo bar lights over a 9 x 5. Total of 20 bars for 1600 watts. Overkill really.

4 drivers total. Advertised 800 watts each and checked at the wall to be 800.

3000k with added 660nm, etc.

Awesome lights and excellent for flower.

Have the newer MJ-650 in a 4x4. In 3500k with the 660’s. Very solid build.

Advertised as 650watts and confirmed at the wall.

I’ve run other boards and won’t go back from these bar lights.

Definitely recommend.

And as far as efficiency, these lights are much more so than older styles. Many more LED’s distributing the wattage.

Question: Do you think 35w/sqft in your 9x5 is overkill? I thought 35ish to mid 40's was the target mark for LED's.

 

[DrKiz]

Question: Do you think 35w/sqft in your 9x5 is overkill? I thought 35ish to mid 40's was the target mark for LED's.

I thought I would need a little more, but with the bars spreading things out nice it is more than enough.

 

[Keesje]

I know a guy personally who pulls at least 2.5 a light with the Gavita 1700e in coco. Ive seen multiple ppl on these forums and other sites claiming to hit 3+ per light with Gavita Leds or LEDs that put around as much light as it.

Im going for 3 with these Meijiu 650s I ordered. Ill have a few test runs with it in a 4x8 and see how the yield and quality fair against 1kw DE HPS in a side by side.

Are you gonna post a grow journal about this grow with the new lights?

 

[Rocket Soul]

so 16 x .2a = 3.2a max per strip? seems high since their 288 boards are 1a max

288 boards have higher max amps or different fV.

 

[Barristan Whitebeard]

so 16 x .2a = 3.2a max per strip? seems high since their 288 boards are 1a max

Do you have a link to the 288 boards you're looking at?

Some of the boards (304 diode boards for example) have a forward voltage over 100 volts and a lower maximum current.

 

[p0opstlnksal0t]

Meijiu: 288 board voltage is 48V and 1.09amps for one board

 

[Rocket Soul]

Meijiu: 288 board voltage is 48V and 1.09amps for one board

Does not sound right, the 48V 288 board should be close to 170w max. Each diode will do 0.6w max.

 

[p0opstlnksal0t]

Does not sound right, the 48V 288 board should be close to 170w max. Each diode will do 0.6w max.

could they be rating it at 1a max due to cheap china connectors or cheap pcb material? it doesnt seem correct to me either

 

[Barristan Whitebeard]

could they be rating it at 1a max due to cheap china connectors or cheap pcb material? it doesnt seem correct to me either

Do you have an Alibaba link or is this what Rita told you?

Are you still looking at the Folux 240 watt kits or are these individual boards? If the 48 volt boards were really 1 amp maximum, Meijiu would have to include 5 boards per 240 watt kit.

 

[p0opstlnksal0t]

Do you have an Alibaba link or is this what Rita told you?

Are you still looking at the Folux 240 watt kits or are these individual boards? If the 48 volt boards were really 1 amp maximum, Meijiu would have to include 5 boards per 240 watt kit.

Ya, im still looking at the folux 240w kits. they are super cheap for the wattage and diodes. i can outfit my whole grow at 40w/sqft and custom 90cri 301b diodes for 6600 bucks

its just what Rita told me, which now i believe she might not know the specifics. theres no way they have 2x 288 boards on an HLG 48v driver and the board has a 1a max lol. although i will be getting mine with ELG or XLG drivers not HLG so i can utilize 0-10v dim to off and a controller.

 

[samayabolshayapustota]

I hope you won't kick me for this question
I order a Meijiu-A8 650w (with 256 diodes on bar) and cannot decide which spectrum to choose. They have 3000k with 4000k + red and 3000k + red. Help me choose for a full cycle, my head will explode soon from this alibaba ...

 

[christopher jordan]

I hope you won't kick me for this question
I order a Meijiu-A8 650w (with 256 diodes on bar) and cannot decide which spectrum to choose. They have 3000k with 4000k + red and 3000k + red. Help me choose for a full cycle, my head will explode soon from this alibaba ...

3000k plus 4000k equals 3500k. So either would be good. I like 3000k.

 

[p0opstlnksal0t]

I’m sold on 3500k now. My first boards were 3000k then I switched to 3000k/4000k mixed and had better results then with just the 3000k alone.

Have you noticed a diff in flower quality or yield in the 3000k vs 3500k?

 

[cloud_]

3k + red

 

[haze010]

Hear a lot of people getting excess out of their drivers if turned up.

People saying that dont understand that the driver name doesnt always mean the wattage. An example is the HLG-120H-C700A, if you look at the data sheet its a 150watt driver, by the name people assume its 120 and think they are getting more out of it.

 

[highvolt]

Have you tried unhooking the dimmer then testing the lights? Seriously that dimmer is junk. I can’t believe they are still giving those out. I complained about them to Rita 2 years ago.

hi bk78
when you got rid of those dimmer boxes what did you use to replace them please, I ask as ive just ordered some leds form rita and they are coming with those dimmer boxes I believe.
thanks.

 

[LoveYouLongTime420]

I have 2 of the mj650 and ran the PPFD numbers last weekend and they all check out to their numbers.

yo do you run your lights with the plastic protector covers on or off?