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This is the best explanation I have seen in this thread. Photosynthesis is an endothermic reaction and will absorb photon energy which is combined with carbon and water to form carbohydrates (sugars and starches) that are stored and used as energy inside the plant. So photosynthesis converts...

All I'd like to point out is that's it's not always about saving money on electricity. The room below used to have 8x 600W HPS lamps in it and used to get very hot during summer, even with aircon. We replaced 4800W of HPS with 3200W of LED with no loss of yield. 1600W of heat was taken out of...

Hey mate, how's the update? ;) We had an issue with the website not displaying the menu page on mobile devices making it very hard to navigate. That's been fixed now, so hopefully it didn't put too many people off. We're also crawling our way up the Google rankings – up from 56th to 30th place...

H2O2 is an oxidising agent that will oxidise almost any organic material as you increase the concentration. In higher doses, it will damage plants. One of the best organic fungicides is potassium bicarbonate which is commonly available. It has the bonus of providing your plants with foliar...

The Bud shot is Acid by Paradise Seeds (NYCD hydbrid). The first room is full of a Chimera strain called Mental Floss (Blueberry x mystery indica). The 4x4 tent that's full of buds is a strain called Amnesia OG (Amnesia Haze x OG). LEDs come in all shapes and sizes but the one thing they all...

No worries mate. I think we just have to accept the HPS vs CMH vs LED debate will continue for some time until the technology has completely proven itself. The funny thing is, I remember growers talking about CMH lamps back in the early 2000s and no-one wanted to give up their HPS lamps for...

Well there are studies out there that show exactly that: https://www.karger.com/Article/Fulltext/489030 The condensed version is, LED has more blue and produces more cannabinoids than HPS. It's not bro science. It's real science. We've also done other studies comparing different LEDs with...

Fluorescent bulbs are actually not too bad. Apart from the cheaper set-up cost and easy bulb replacement, fluorescent lights (like other mercury-based lamps) generate a plasma that emits UV light that is then converted via a phosphor into visible light. Just like LED, there is a conversion...

This is one of the tests I was referring to: https://www.rollitup.org/t/thc-cbd-terpene-test-results-uva-vs-uvb-vs-none.1001617/ Here is another: https://www.karger.com/Article/Fulltext/489030 It all depends on how you define "light quality/spectrum", as not all wavelengths are absorbed...

What you're describing is an LM301H with more red phosphor – perhaps not dissimilar to current CRI90/95 type phosphors that shift the red peak. Or it could be two dies, blue and red, in one package. That would be more efficient than phosphor conversion, but I thought the LM301B was a single die...

Neither. LEDs are more efficient and put out less heat for the same results. And we've proven you can get the same THC/CBD/Terpene results with near-UV as you can with added UVA/UVB. There's also the issue of layout: you have a square-shaped area and having two or three HIDs in a row is going...

That's right. And it's been repeated since then. Check out this thread: https://www.rollitup.org/t/a-room-full-of-leds.998323/#post-15122968 Same grow, different view. 345W on the left, 400W on the right.

That's one of the features of these boards. There are "safe areas" on the board that are marked out by the black-lined boxes on the edges and circles in the middle. You can drill anywhere within those areas and you will not hit the copper trace or short the boards. It means you can also use any...

That's a lot of firepower. These boards were literally made for a 3x3. Two boards with heatsinks form a 17"x17" Square, draw 370W at the wall with a HLG-320H-48A or AB driver. Will replace a 600W HPS: https://growlightsaustralia.com/product/double-high-light-and-heatsink-combo-350-450w-max/...

This is great, as it measures UV as well as infra-red heat that can be used to directly compare the efficiency of different lighting sources. If only they could combine it with a spectrometer. I don't know why PAR is only measured between 400nm and 700nm considering far red light (730nm) plays...

It's swings and roundabouts. Aussie buyers don't pay local taxes on overseas products, but they get hit by the 10% GST when it arrives. We export tax-free, but sometimes there are taxes at the other end. The UK for example has VAT. We can work with buyers to try to reduce their end cost...

OK, the RIU discount coupon issue has been fixed. If anyone has any queries about bulk discounts, discount codes or how to remove local taxes etc, please PM me here or email the site at [email protected] This link explains the 10% GST applied to all Australian orders and how to...

Got the email mate. DIYLEDUK will be stocking our boards soon. I hope he doesn't mind me posting the link: https://diyleduk.com/collections/high-light-diy-led-board-kits

Our boards work out about the same price or less than Quantum Boards when you take into account that ours are about 1.7x bigger with 450 LEDs versus 288 LEDs. If you are in Australia or New Zealand they will be cheaper, especially if you are also ordering heat sinks. Our heat sinks are also...

Hi Rocket Soul, Aussie tax is 10% so you can take that off the price of all products. Then if you use the discount code FORUM you can take another 10% off. So that's 20% off all prices if you are overseas. If you go to the website www.growlightsaustralia.com and click something for your Cart...