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Yes with a surge protector you can cut it to around a kV. I have the MOV based ones that clamp to 1.5kV and can absorb 1100J.

The AC power is not always the well behaved sine wave that it is supposed to be. There can be very short but nasty spikes on it which you will be passing on directly to the LEDs. Consider for example a lightning strike at some distance. Here is a graph of the voltages induced in the mains wires...

Very nice panel Marcus! How warm does it get after a few hours? With all the red emitters that you have it pays to keep the panel as cool as possible.

From the AT600 unboxing video: Nominal input power: 700W Luminous flux: 52180 lm Luminous efficacy: 84.3 lm/W 52180 divided by 700 is 74.5 not 84.3, but anyway even for a pink spectrum this is not so super.

How weird is this. XML2 running at 700mA, Vero at 350mA.

Cree really tends to have a lot more blue. Even the 3700K Cree has more than the 5000K Bridgelux: XML2 3700K 420-480 nm blue : 24.4% power, 20.0% photons XML2 5000K 420-480 nm blue : 30.2% power, 25.3% photons Vero 3000K 420-480 nm blue : 8.1% power, 6.3% photons Vero 4000K 420-480 nm blue ...

That's a very interesting design. With all the heat going directly through the chimney your heat issues should be gone. Have you drawn first light yet?

BML is the only light I would trade my own lights in for. I would take the plastic cover off, and also put up some reflecting walls.

It's the most common bio feed around here. It gives me nitrogen toxicity when using the recommended dose so I use half that dose. Not sure if my plants are getting optimum phosphor levels now. A resistor would work but gives a loss of ΔV * I, typically a few percent. You could replace the...

It's kept kitchen clean inside so that I can the eat the leaves without worry :weed: The nutrients they get is Plagron Alga Grow/Bloom, supposedly based on algae extract.

Parallel driving is not the recommended way because the results are unpredictable; It's a bit of a lottery of what Vf (forward voltage) your COBs have and hence how the current will be distributed among the COBs. The best thing (apart from not doing it) is to do you own "binning". For example if...

Last week the cheapo driver that powers the veg room failed. It's replacement failed within a couple of hours. No harm was done to the plants but I've really had it with the cheapo's. So time to get something better, in this case the shiny HLG-60H-C700A The driver board has been totally...

Yes, that driver works great for 5 parallel strings of 5 Vero's each. I've used this little driver to sort the Vero's by their forward voltage. If you don't sort the Vero's beforehand nothing bad will happen but the strings will be running at different currents. Here is a picture from the...

The absolute max drive current of the Vero 29 is 3150 mA, but imo it's better to stay at 2100 mA or below. A good and dimmable driver is the Mean Well LPF-90D-42.

My knowledge is your knowledge I hold nothing back. So yes, 4% is a sort of rule of thumb, the actual value depends on incident angle and refractive index and can be calculated with the Fresnel equations. The amount of absorption is negligible for any semi decent glass. Btw what sets optical...

SDS you're making things way too complicated again... It's a glass lens, it will have a minimum of about 4% reflection per surface, 8% total. The only way to improve on that is anti reflection coatings. Judging from PSU's photo the lens is not coated. IMO it makes sense to remove the lens if...

Keep in mind that Supra's most excellent spreadsheets are based on minimum flux numbers, not typical flux. When comparing CXA vs Vero this would give a bit of systematic bias in favor of the CXA. The reason for this is that the CXA is binned and the Vero is not. Or put differently the Vero is in...

Can you post more info on this? Can it handle closed circuit, open circuit, and AC spikes?

120W in, 10000 lumen out, so the efficacy is a paltry 83 lm/W. In my cursory assessment of Innoled as a company, it's four guys, mostly in marketing, that take a studio light COB, screw it to a heatsink and target it at the gullible Cannabis growing market.

When light has interacted with matter it becomes an event.