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That is very likely true. I have only run into a couple of others that caught on to his bullshit. They just disappear. Me I'm too old and stubborn. I think it is wrong to state things as fact when giving advice. He has given a lot of bad advice and I have not been on here too long. I'm...

It easy with just a kitchen oven. Crank it up to 500° F. Turn it off. Put in the PCB for about 90 seconds. I had two Zevatech Placemat 740 pick and place robots. I had a five zone convection over with ceramic heaters. The conveyor belt looked like 6 piano wires. This photo was taken...

Can you say Ad Hominum? And still misquoting me. Nice graph. I do not remember the numbers at 36" & 40" Like 97 and 120? That would be exactly what an ISL calculator would compute. But 40" is less than 2x the fixture's max 30" dimension. A little short of the 5x rule. Just plug the...

Absolutely. I found the Bridgelux Gen 2 EB strips run cool. No heatsink required. Just screw down the ends of the strips to an aluminum angle bracket frame and add something to support the center so they don't bow. I've the 22" come out of the box already bowed. The HLG-550 has 1152 LEDs...

Look what RolliTup sent me about the time you posted the above comment: You have been awarded a trophy: Seriously Likeable!

Conversions are for lumen/PPF and lux /PPFD You can use a conversion factor to convert within the same geometries. Examples: lux (illuminance) > watts (radiometric irradiance) > Photon Irradiance (µmpl/m²/s)> PPFD (µmpl/m²/s) Radiant power > Luminous flux > Photon flux > PPF (µmol/s) There is...

You're welcome. Did you understand where and when to use it? When I asked this question: With an LED fixture at distance of 12" can easily produce a PPFD of 400 µMoles. Is that equivalent to an HPS 400 µMole hung at 1 meter? And what about the Cree reference fixture? There fixture matched...

You continuously misquote me, again, again, again, and again. No I can take two PPFD measurements with different characteristics and distances then normalize them at one distance. I use ISL to do the normalization. Not reverse ISL. WTF? There's example how your mind is like a sieve. Then...

In the first frames at low height, on the left hand image, what are those four pinkish circles in the center? I like. Why did @wietefras like yours and not mine? Yours has the yellow and green he was complaining about. If he wrote one with reflecance in a few hours, he should be able to...

I know it was dumb. It was you asking about those heights. Yes I made reflectance measurements at 5" 10". You asked about 4" , 8" and 16". Reflectance was a negligible 3%. Then I did 40" and 36" because ISL works fairly well at those distances and even though those hights would never...

Here is why I normalized the PPFD to 1 meter. From those two CoBs I compared. I did that to verify I was in the right ballpark with my measurements. When comparing two CoBs with different wattage I have to normalize to the same height. That's why I could use the same 700mA driver for both...

That's nice. Thank you. Corrections? Ouch. I know he has been on here longer than me and gained some respect for his wizardry. I'm afraid that respect will be lessened as long as I hang in here. He has been very good manipulating others with is ad hominem replies and misquoting me...

There you go again, putting words in my mouth. No they are what I expected. Why you expect something else probably has to do with your faulty "common sense". I guess you forgot about the measurements I did with a CoB. A CoB does not violate the "5 times rule". And guess what? The...

You continuously misquote me. You are purposely being deceptive by leaving out the rest of what I said. I concluded conclusively, reflection has zero effect on Inverse Square Law (ISL). Contrary to @wietefras that said that ISL does not work in a grow tent because reflection cancels ISL. I...

Absolutely. It's not ready fro that yet. I go into the source code to enter the parameters for now. I do have one you may like that is ready for prime time. It's a Height vs. Penetration app. It's used to adjust the PPFD and height to an optimal level. For example a 1000W HPS is usually...

They'll be fine. You are below 65°. 95° C is just a notice to cover their ass in case someone litigious gets burned. For a surface which is touched continuously, such as a notebook computer surface, the UL, ANSI, CSA, and IEC safety standards for IT equipment specify a maximum temperature...

That is almost the driver I will be trying next. Because I will be adding a seventh strip I have to go to the 240H. The 185H cuts off a 143v. Too close for comfort. Although when they are run in series the voltages will drop. In parallel the strip with the highest voltage will rule. Also...

As long as the Vf is between 27 ~ 54V, there will be constant current. Theoretically if I set the HLG for 3 Amp each set of strips would get 1 Amp each. But they will never run balanced. As long as the forward voltage is with in the HLG's CC range the current will be constant. The current...

That's not too hot. The Gen3 F-series can handle up to 65°C. You would not be able to touch 65° for a second. The temp you felt was probably around 55-60°C. I do not like to drive these strips much over 40°C. At 40° I can hold my finger on the strip for a long time. Metallic surfaces will...

I ran the simulator from 36" down to 2" and the problem becomes obvious. This will be a 7 strip when I get the new driver. And I think I need to move the strips so the space between them is the same. Not to spread them in the middle. That's why I like the simulator. It took a long time...