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Hi mate, if I understand your question correctly, there were 2x 315W CMH and 1x LED High Red double board running at 240W (at the boards). If you want to know what a "High Red" board is, I'm going to have to spam you: https://growlightsaustralia.com/product/high-light-225w-max-high-red-2800k/...

I'm splitting this into two posts so they don't get too long. Its a shame LED Teknik was banned from RIU, as he posted up a 660nm showdown between the top bin Cree (G bin), top bin Osram (V5-V7), and a custom 660nm 3535 LED that cost half as much as the Osrams, and a third as much as the Crees...

If you're referring to the latest OSCONIQ S 3030 0.2W white phosphors, on paper they look really good – even slightly better than Nichia. I say that with two caveats: 1. Nichia has just released its latest 3030 model NF2W757HT-F1. Again, on paper, it is a little bit more efficient than the...

The LM301B and H are the same diode. LG has some very efficient UV and near-UV LEDs for good prices and I believe Epistar makes 660nm epis for most of the other manufacturers who put them into their own packages. We took a slightly different approach for our full-spectrum UV board and used...

The best DE CMH lamps put out around 2.0 umol/j, so you really want to be adding something a bit more efficient than that. And so it depends on how accurate advertised PAR figures are for the type of LED you're looking at using. Perhaps more importantly you want to compliment your CMH spectrum...

Yes and no. Compared to HIDs, LEDs convert more electrical energy to photosynthetically active radiation (PAR) and less energy to infrared radiation. This means you need fewer watts of LED (typically two thirds) to produce the same amount of PAR as CMH or HPS – which is where the common...

Mate, post up some pix! If anyone else wants to add their HID + LED grow photos to this thread please do.

This is a very interesting topic. Mainly because even scientists can't agree! There was a study in 2010 that proposed stomata opening and closing was a function of total radiation absorbed by the leaf (increase in leaf temperature), as opposed to the traditional theory that blue and red light...

Well, it was a rhetorical question :mrgreen:

One week later, and you can see for yourself. This guy knows what he's doing. He's a personal grower, but quite experienced. The hot weather hasn't bothered his plants at all. No aircon, just a fan for circulation. His last summer grow with the 2x 315W CMH and 1x 600W HPS lamps produced...

With all the debate over which light is better, we thought it would be interesting to document a hybrid CMH/LED grow, as we believe the two light sources can be complimentary – even if CMH isn't as efficient as LED ;) We were contacted by a grower who wanted to get into LEDs but had already...

Thank you. There are also people in Australia who don't believe the science, even after what has happened. What can you really say to them?

It's not grounded on the DC side. It's only 48-50V.

Yes, I know what you mean now: like a side-ways T With the fixtures above, you can see the eye bolts stick up on the back to allow the fixture to be put down LEDs up or down. I know that some heatsinks are fairly flimsy and the fins bend easily, but I'm not bragging when I say our heatsinks...

If you download Dialux, I can forward you the IES files we use. Much faster and easier to use a simulation than a physical PAR meter. All the sims we've compared to actual PAR maps using Apogees etc have been very accurate. It's great for helping growers work out how much light they need for any...

This is true. There is so much mis-information about LEDs that it has caused the industry more harm than good. So much so, we even devoted a page to "LED Myths" on our website to redress it: https://growlightsaustralia.com/technology/led-myths/ "Equivalent watts" is the worst culprit: it...

Nice PAR map mate. It looks similar to our Dialux simulation here, also at 4A (200W) and 45cm: https://growlightsaustralia.com/technology/mounting-options/ We haven't tried the XLGs yet, but we do sell the ELG-200-48A and AB drivers with the single board kits here. The XLG's aren't available...

Thanks mate we try. (:

Yes, it was my favourite part too. It perfectly explains why more light energy (PAR) is preferable to infrared energy in the grow room.

I can answer this. Rocketsoul is right, you can use T-bar or L-bar aluminium extrusion, also known as "angle bar". Many hardware stores carry it as it is used to make window frames. T-bar is stronger and we have used it in the past, but we now use L-bar for our assembled units as it does not...