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That's a lot more than we sell. We've sold maybe 300+ HLG-480H-48/54 drivers and had 3-4 returns. But we've sold a similar number of HLG-320H-48 drivers and had none fail so far. We don't sell that many 200 and 240 drivers.

Hi Dr.Strain I don't want to criticise another manufacturer's lights but can you tell us what you think is so special about the Gavita or are you asking us? I'm not sure if that was a question! They just appear to be normal bar lights with Samsung and Osram diodes. Lots of manufacturers make...

Hi Speedtriplebbc you are right. Traditional PAR is defined as 400-700nm so anything outside those wavelengths is not counted in most PPFD readings. More than 10% of the light in our boards falls outside 400-700nm so a PPFD reading of 900 for one of our boards is close to 1000 in reality. As PC...

Hi Kassiopeija, I'll have to get @Prawn Connery to look at this later but I was under impression that green light was more effective at lower PPFD not higher? Do you know what spectrum the Fluence was? I know PC is always saying that indoor cannabis was selectively grown under HPS for 40 years...

Broad-band phosphor. This graph is from Lumileds: https://www.lumileds.cn.com/wp-content/uploads/files/WP32.pdf What indoor lighting manufacturers call "wasted light" is exactly what plants thrive under. The broad phosphor has more and deeper red, as well as far red and slightly less green...

We will have to do something with the prototypes so that might be an option. I can't promise. I can answer this. Narrow band phosphors are more efficient and on their own they are nice diodes. But they cost a little more and they suffer the same as CRI80 diodes that have very little cyan and...

You have also tested Samsung vs Nichia diodes like we have so of course you know that binning numbers do not always reflect reality. That is why we like Nichia because every time we test their LEDs our results are at least equal to or higher than what they have promised.

Yes. At some point. If the difference in price between an average performing diode and a top bin diode is 4c vs 8c then you could double the number of diodes and achieve efficiencies that way. Some manufacturers have already gone this route. In reality we pay maybe a 0.5c premium on LEDs that...

Hi Kassiopeija yes the bins are marked on the reels when you receive them. There will be a model identifier with the CCT (Kelvin temperature, including colour shift), voltage and luminous flux bins marked on the sealed package, as well as the reel itself. This is the case for all the LEDs we...

Same technology but we use different chips. We've actually been using narrow band phosphors since we released the original High Light 420 board in 2020. Ours are made by LED Teknik and are triple-die 3030 diodes. The Nichia narrow bands are single die and the Bridgelux are dual die chips. That...

I don't wish to cause an argument but I am confused by what you mean as "gaps" in LED spectra. We use a Danish Viso Systems LabSpion Goniometer to measure our lights and this system is regarded as not only one of the most accurate light measuring devices on the market but it measures every...

They should be the same efficiency as the boards and because the strips won't exceed 5A each which is the connector rating we can get a little more power out of them. They will be rated at 1.08A at around 47V for roughly 50W each. The spectrum was going to be the same as the High Light Gen2...

An old-skool grower by the name of @Prawn Connery did a lot of growing and research to find what worked best. He was involved with Australian hemp famers who first noticed the increase in D9THC levels in hemp crops grown under the Australian sun with its higher UV index and postulated that UV...

Hi mate, the UV percentage will be based on efficiency x watts. So let's say your UV strips are 30% efficient and our boards are 60% efficient, then the actual percentage of UV light out of the total would be closer to 1.5% than 3%. Our LED panels are just over 60% efficient (at lower currents)...

Yes. These seedlings were grown under our new propagation spectrum which has about 1% UV. This photo is from a grow by @Prawn Connery. I'm sure he won't mind my posting it. ;) You can see how strong the Nichia diodes are.

Not sure I understand the question. Is someone claiming they know of more efficient UV diodes than the NVSU219CT? Because we haven't found any. That's why we use them.

Little know fact. THC levels normally peak two weeks prior to traditional harvest. However that's also the time the plant really bulks up. What that means is you are better off running UVA at least all the way through flower if not for most of the grow.

The Nichia 405nm UVA diodes we use have been tested at around 72% efficient. But you are right about the spread so it might even be worthwhile buying more UVA diodes that are cheaper and less efficient so that you can spread them over the grow more easily. Or else maybe just buy a plain...

Hi mate, 5 inches is not a lot of head room. It's about 12-13cm. UVA wouldn't be an issue, but you would need to have the LEDs turned right down. I wouldn't be concerned about 0.5-1% UVA as much as I'd be concerned about overall light bleaching at that distance. But it all depends what LEDs you...

Our original High Light 420 boards had only 0.5% UVA and and produced up to 25% more D9THC than generic 3000K CRI80 LEDs (Samsung QB288s). The Gen2 boards now have 1% UVA and we have already documented a 15% increase in D9THC over the original High Lights so I'm guessing that for a full-cycle...