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I will take readings like the Hortilux chart next week and keep the sensor pointed sky high, if that makes everybody happy. I will also wrap the inside of the tent with the black side of the black and white poly to reduce any reflectivity, but that has to be the spot where I'm taking the...

I can take some "standard" data points next week if you would like. I angled the sensor because plants are going to look towards the highest intensity of light regardless of which direction it is coming from. If they see it why shouldn't the sensor? I was thinking if you can see the trend of...

I also took readings from the Sun Systems LEC 315 for some fun comparisons. These readings were also taken from the bottom of the reflector. I didn't bother measuring at 48" because the intensity was fairly low at 36".

So after some data logging, the results are in... I will let you guy's come to your own conclusions. I'm doing this because I have access to both the lamp and the tools. I have taken data points at 17 different locations in a 4'x4' area with a PAR meter at varying distances from the bottom of...

We'll have to see about the video, but I will definitely be logging the readings in a 4x4 at the height recommended by SK and probably several other heights. I will post the results once I have it all worked out.

I think you have a slight misunderstanding of how "Luminaries" perform compared to the individual LED chips that the Luminaire uses. Depending on the number of chips used, what current they are run at, the spacing between the chips, the thermal characteristics of the fixture itself, and if any...

Most HID setups don't produce uniform/even light density over the whole foot print. It's not about exceeding or even meeting 1500 umol. It's about reaching 1000 umol over the ENTIRE canopy. It's about redistributing that intensity so all plants are illuminated equally. Whether it be a ceiling...

We need par readings comparing the "best" COB setup vs a similar wattage DE at ranging distances to put this debate to rest. Sure I can. The PAR readings don't lie guys. In a 4x4 area there might be 2-3sq ft of 900-1000 umol( 600W Horti HPS) at a distance where temps are ok(22"). The Par drops...

How so? I mentioned I prefer yield over efficiency. And I was referring to products that could be acquired at a retail location or online. I don't think DIY large scale is a viable option. I'm willing to cover about 50 sq ft with a certain wattage of COB's that will be similar to most HID...

Assuming we are talking about cannabis... Efficiency definitely takes a back seat to total yield. I live in Colorado and work at a grow store. People (dispensaries and not-so-legit operations) are loading up warehouses with DE fixtures or standard HPS setups. If they were that concerned with...

Thank you sir. Yeah I took a picture of one of the drivers because I figured somebody on here would be interested. MW HLG-240H -36B

I would put your notepad and calculator down for a minute and wait for the real world data to come... The output will be tested with a PAR meter and the power consumption will be tested with a WATT meter.

I remember SK saying that they revamped their components when they released the "plus" model. I would imagine a company endorsed by Cree would probably get quite the discount on their chips... I've actually never seen any literature or documentation where SK lists what kind of chips they...

I personally feel that a lot of people are too concerned with saving watts and "efficiency" that they forget or just don't know how much light intensity is needed to grow quality sizable nugs. COB's don't have a whole lot of light density at distance unless they are run hard or grouped closely...

My buddies run of two Gavita 600/750 FLEX each in its own 4x4 tent. Assorted strains. Not the highest quality but the yield was amazing. The tent with big chunky nugs yielded just over 3 lbs. House & Garden in coco. The other tent was hashed without weighing because of a really long story. I...

So my grow store received the new Spectrum King SK400+ today. Just wanted to clear up any misconceptions or misinformation about this product. This will probably break some hearts... So first off, the SK does NOT use Cree XB-D's and as far as I can tell does not use Cree XM-L2 either (possibly...

Thanks, but I'm logging everything with a PAR meter. No offense to any math wiz here, just trying to use real data to achieve my desired results. Under my 600W HPS my largest densest cola's grew under the "hot spot" of the reflector which receives about 1000 PAR @ 22". I would like to achieve...

Nice. After doing some testing I have decided to change the spacing of COB's closer than when previously posted. If running 90 degree reflectors, the spacing really needs to be 12" on center (or closer) between chips. This will help utilize the crossover pattern to gain intensity at depth and...