For a 4 cob setup I'd go with the 1812 over the 1212 unless you don't mind the limited wattage. 1212's are 36v while 1812 and up are 50+v and with that specific driver there is a benefit in higher voltage cobs.
Lighting ?'s about converting mars type led to cobs
- Thread starter GoatFarmerDan
- Start date
I've got about 10 CXA2530 3000k I'm going to ebay and buy a couple more 1825's. The 1812 will save a couple bucks but the 1818 is a better investment IMO.
Any 50v citizen would give you a higher wattage with this driver.
Ok that all makes since. Thanks.
The closer I get to placing my order the more goes through my mind.
It seems like the choice of combinations is endless!
The closer I get to placing my order the more goes through my mind.
It seems like the choice of combinations is endless!
Absolutely. Citizen has allot of cobs available. Either way they are all make great lights. 1212's are one of my favorite cobs since they are so inexpensive and still have great specs. With that driver I'd go for a better cob while other combinations I would lean towards the 1212's. My veg light is under driven lower wattage so I went with 1212's while higher wattage flower only lights I went with 1812's and 1818's.
Seriously I feel pretty silly with the amount of questions, but I have more.
Would the Meanwell 120H-48A be compatible with two CREE CXB3590 72V.?
As you can tell I'm still all over the place with the combo I should choose.
I will add that I also have 3 of the Mars 300 type lights that work so I could use some of those for side lighting or whatever.
Would the Meanwell 120H-48A be compatible with two CREE CXB3590 72V.?
As you can tell I'm still all over the place with the combo I should choose.
I will add that I also have 3 of the Mars 300 type lights that work so I could use some of those for side lighting or whatever.
Sheeeet sorry man I didnt see this. I can only answer your questions if I know the answer and if you ask. I haven't complained about answering questions in 8 months here so please don't make me second guess myself. 
No that meanwell won't run the 72v cobs. As for the 300's I'd tear those things up and add in 50$ worth of cobs.
Efficiency wise which is light to heat ratio
Very basic numbers and within but not super accurate.
Mars300 draws roughly 150w at the wall. Times .2 for 20% efficient. =30 par watts. That's what the plant sees. The remaining 120w is heat. Yuck.
With 4 citizen 1212's at 650ma which is the drivers specs you would be at 20w per cob Times 4 cobs = 80w times 50% efficient = 40 par watts and 40 watts of heat.
+10 par watts and -80 watts of heat for 50 bucks.
Now if the light has 3 drivers another option would be 3 1812's. At 650 am you would get around 30w per cob times 3 cobs = 90w at 50% efficiency you would get 45 par watts and 45 watts of heat.
It's hard to grasp but the efficiency is a direct relation to the amount of par watts the light puts out. The higher the efficiency the more light your plants see per watt.
Ask more questions will ya.
No that meanwell won't run the 72v cobs. As for the 300's I'd tear those things up and add in 50$ worth of cobs.
Efficiency wise which is light to heat ratio
Very basic numbers and within but not super accurate.
Mars300 draws roughly 150w at the wall. Times .2 for 20% efficient. =30 par watts. That's what the plant sees. The remaining 120w is heat. Yuck.
With 4 citizen 1212's at 650ma which is the drivers specs you would be at 20w per cob Times 4 cobs = 80w times 50% efficient = 40 par watts and 40 watts of heat.
+10 par watts and -80 watts of heat for 50 bucks.
Now if the light has 3 drivers another option would be 3 1812's. At 650 am you would get around 30w per cob times 3 cobs = 90w at 50% efficiency you would get 45 par watts and 45 watts of heat.
It's hard to grasp but the efficiency is a direct relation to the amount of par watts the light puts out. The higher the efficiency the more light your plants see per watt.
Ask more questions will ya.
Thanks BigSm0.
This is what I'm thinking at this point...
MeanWell HLG-185H-48A
3 Citi 1818 90CRI cobs
3 SST X passive heatsinks
My budget is a bit of an issue so I'm going to add the 4th 1818 when I can.
This is what I'm thinking at this point...
MeanWell HLG-185H-48A
3 Citi 1818 90CRI cobs
3 SST X passive heatsinks
My budget is a bit of an issue so I'm going to add the 4th 1818 when I can.
That's sounds like a fantastic plan.
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