Danielson999
Well-Known Member
Right but you can run 4 cxb's from one HLG-185H-C1400B and get 50w per cob. With the 240H-C1400B version you can drive 5 cxb's at 50w per cob.
Basically this light setup is for my flowering period. I will set up a veg tent/lighting setup in a smaller tent after I finish this tent. I'm researching Kelvin temp for the COBs right now and see that the 4000k gives more lumens/watt and PAR watts, and also raises the COB efficiency. So is the 4000k better than the 3500k?Right but you can run 4 cxb's from one HLG-185H-C1400B and get 50w per cob. With the 240H-C1400B version you can drive 5 cxb's at 50w per cob.
If this is just for flowering then 3500k or even a mix with 3000k and 3500k is best. Don't get caught up in lumens/watt because in reality, the 3500k or 3000k gives more par watts in the spectrum the plants need. Also, why wouldn't you use an HLG-185H-C1400B? It will drive your 4 cobs at 50w with better efficiency than the 240 version.Basically this light setup is for my flowering period. I will set up a veg tent/lighting setup in a smaller tent after I finish this tent. I'm researching Kelvin temp for the COBs right now and see that the 4000k gives more lumens/watt and PAR watts, and also raises the COB efficiency. So is the 4000k better than the 3500k?
Also after seeing a couple threads doing 3 rows of (4) CXB3590s, I think I'll be going with 12 of them and 3 HLG240h-1400b drivers (in which I would be able to dim to 700-1400 ma) on (3) 5.886"x44" Heatsink (i made it larger for better heat absorption and light spread). What do you think?
You're absolutely right, after doing the math the COBs will run @ 34.89 FV, so using Ohm's Law 34.89 x 1.4a = 48.846W per bulb. 48.846W x 4 = 195.384W. Earlier I was basing the FV off 36V, so 36 x 1.4 = 50.4 and 50.4 x 4 = 201.6 W. I thought that since the HLG 185h-1400c only went to a maximum Watt output of 200.2 W that it be too small in terms of wattage output so went with the bigger 240's which have ~250WIf this is just for flowering then 3500k or even a mix with 3000k and 3500k is best. Don't get caught up in lumens/watt because in reality, the 3500k or 3000k gives more par watts in the spectrum the plants need. Also, why wouldn't you use an HLG-185H-C1400B? It will drive your 4 cobs at 50w with better efficiency than the 240 version.
How I open this in Windows 7?download the citi calculator in bggrass's signature you can play around with currents and heatsinks and see all your options