Search results

Let's figure this one out: 1.) PAR W = ~240W 2.) Targeted Area = [(50" x 1' / 12")*(24" x 1' /12")] = ~8.33 square feet = 0.774 square meters 3.) PPF = [(240 PAR W) * (4.70 umol/J) = 1128 umol ^^^^ the 4.70 was arbitrary, as I don't know which temperatures you're running with your Vero 29s...

@Jack Reacher As you know, there's so many options to choose from. Luckily from what I see from your comments, you're working with a relatively small space so running smaller cobs (Vero 10, 13) rather than bigger cobs (Vero 18, 29) will be a more suitable approach for you. If you plan on...

Nice, it would appear that the thermocouple you went with closely resembles the one that Bridgelux used in respect to gauge. There's like little to no way of applying the stock thermocouple that comes with the digital thermometer I mentioned in the same application that you provided regarding...

Gooood lord, could those buds get any fatter!? :weed:

@stardustsailor What's the word on the ole V series Tetras these days? How have they worked out for you?

@hockeybry2 I don't believe any of the options so far provided would be enough for that space during flowering, maybe the CX300 could pull it off but at ~750$, thus exceeding your spending limit unfortunately.

How much are you looking to spend, @hockeybry2 What kind of area are you working with?

Your chips are dimmable, right? Have you considered measuring temperatures at lower or higher, if applicable, currents? I'm happier now to see that you've indeed measured some temperatures and so forth. Were those readings taken after brief or prolonged durations of operation? Why not include...

@Abiqua That is a great question to bring up. I performed a few tests in between the others that I posted, where the 4' x 4' tent was sealed and with no ventilation besides a few 4"-6" diameter openings. This showed inside tent temperatures rising upwards to 95 F, thus concluding that if one...

I use only MeanWell HLG drivers for cobs, for fans it's a different story. I have read and recorded both current and potential for multiple cobs at various outputs. Voltage was always typical for Vero when referencing to the datasheet (at set currents), with currents always being spot on for the...

If it's not too much to ask, where's your reference or link? SupraSPL does a bunch of different tests, so narrowing it down to one would be nice on your part, if not, no biggie, I'll ask him later about it.

Yes, the K-type thermocouple came along with Digital Thermometer. Attached is the Case Temperature vs. Relative flux for the Vero: Cree doesn't offer such a graph for its CXB3590, so I went ahead and created my own. It's not as curvy as the Vero version but is still reliable for reference...

@PurpleBuz How again did you show me? You must have left out actual data or a link to someone else's, as I couldn't conclude on your theory. @Greengenes707 Why do you believe we should compare only 3500K to 3500K or 3000K to 3000K and not, say, Vero 4000K to CXB 3500K, Greeng?

What's driving me nuts is that I'm not seeing the numbers that I'd like to see given the fact that the efficiency for the CXB3590 3500 (CD) on paper is anywhere between 7~12% more than the Vero 29 4000K at currents of 400~2400mA but yet when measured with an Apogee 120 PAR sensor, the results...

Lol, what's your point? Look at the question I was answering? Someone asked about what forward voltage was like for the Cree CXB3590 at currents between 250~500mA and the Cree CXB3590 datasheet doesn't provide anything lower than 1400mA for 36V version, as your photo reinforces, while Bridgelux...

The rated current of the driver itself? Can you give me an example? @wietefras Are you running anything else from the wall with that cob setup, such as fans+fan for driver?

Huh? @Fastslappy

I've noted that the HLG drivers from MeanWell don't always operate at the efficiency they give on their datasheets for given loads. Has anyone else come across this? Sometimes ~2% less than posted.

This has been something I've noted, that companies, such as GoGreenLED, will price their products at inflated costs but then offer ridiculous discounts to make up and better match their competitors in prices. It's most definitely a scheme. Can you imagine if someone came to you and said "hey...