Bueno Time
Well-Known Member
RegularsSound like some dank crosses BT did you make fems or regs?
RegularsSound like some dank crosses BT did you make fems or regs?
I got a similar light meter and there is a conversion from lux to lumens and then convert to par
For the CXA 3000K, divide the number of lux by 67.3.Whats the conversion from LUX to umol for white LED's?
Thats pretty much the setup I have been running for a little while now. 4 x Z2 CXA 3070's and one of those fastech drivers per COB. Works well. Although, there is an ebay link for a driver Supra reccomended that were more efficient and actually did output the full 50w for pretty much the same price. I think these fastech drivers are not as accurate and is not outputting the full 50w. Either way, with 4 cobs, 4 fastech drivers, 4 cpu/heatsink combos and a sheet of aluminium to mount it all on. Cannot complain. Works like a champ. I'd say go for it (but I really would reccomend the units from ebay as they also have a ground connection which the fastech drivers do not have).Hey supra,
Thanks for posting all this great info. It is much appreciated.
I was wondering if you thought this would work as a combo.
12x: http://www.fasttech.com/products/1612/10004218/1320600
12x: http://www.digikey.com/product-search/en?mpart=BXRC-30H4000-F-03&vendor=976
I would be making 4 fixtures with 3 cobs each actively cooling each cob. I am cool with soldering etc... My questions are:
-the driver runs 1.3amp as per your review. What would the wattage of each COB be in this setup? at 1.4amp I believe the data sheet says 42.3amps...
-Any ideas for encasing the drivers? mounted in a small pc case and fan cooled maybe?
-what about UPC panel mount and pass through source? (for daisy chaining?)
-What gauge wire do you recommend? I want to remote mount the drivers outside the tent and do not want extra heat/resistance to impede performance.
Thanks again!
SG
I'd say that shows how so close to dead on we are! I bet the 2700k is dead on perfect Thats what I am still saving up for nowFor all the 1400 mA/array ...lovers ...
CXA3070 ---- Z4 ---- 1,4 A ----- Tc=55°C --- 3000°K ---80CRI
( Numbers for a single array .Multiply values accordingly ,for more than one array. )
View attachment 3176969
Cheers.
here you go http://www.ebay.com/itm/50W-Watt-High-Power-LED-Driver-AC85V-265V-50-60HZ-Waterproof-/380921914972?pt=LH_DefaultDomain_0&hash=item58b0b7265cHave a link to those drivers on ebay? Im down for a ground pin.
I agree, this is a very important point. Some growers are looking for a massive light blast without the heat of 1000 HPS. For them we can dissipate up to 50W/ sq ft. (39% efficient lamp) But for those looking for max efficiency we can use about 25-35W/ sq ft with lamps that range from 36-49% efficiency and get great nugs. (Z2 at 1.4A is 36% and AB at 700mA is 49%.)Hey I was wondering, for people who use cxa3070 do you have one chip per square foot ?
But I guess there is no point choosing the most effectient light if at the end you don't give it the maximum space to achieve a an efficient harvest.
Damn Im glad you posted this! I was looking at the vF max and crapping my pants just now thinking it might not work. I bought 3 of those drivers you just linked and they have a vF listed on the case of 37V max I thought I got the wrong drivers for a second.Java, I love that driver but I am having a problem with the seller. They sent me a shipment of drivers that are slightly longer than the original I tested. These new drivers were defective. Vf range only goes up to 25, they only put out 700mA @ 37vF and the operate at 83% efficient. To be honest I am angry at the seller. They made me return the drivers to China to prove my complaint despite photos and I have been working with them for over a month to try and get (half) my money back. Hopefully other DIYers dont get anything from that defective batch.
This driver on the other hand, has been performing great, puts out over 1400mA and runs up to 40vF. So far not a single dud out of 52 drivers, although they have yet to be tested for reliability.
Thanks SDS awesome graphs I love it!
SG, those 50W Fasttech drivers are a perfect match for the Vero 18, it should put out about 1.25A. A 3000K Vero 18 should run at a minimum of 32.5% efficient, dissipate 38W and cost $1.64/PAR W. That is a very cost effective setup.
Thats a huge increase. AmazingZ2 at 1.4A is 36% and AB at 700mA is 49%.)