New lights, new spectra and some High Light strips

Grow Lights Australia said:

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 has explained far red diodes are not very efficient so even though they need less energy to create a photon of light they are not that efficient to begin with. To calculate umol/j you multiply efficiency by Quantum Efficiency of Radiation (QER). QER is a measure of how many photons you can make with 1 joule of energy based on the spectrum. Shorter wavelengths like blue and UV require more energy to make a photon so have a lower QER. Longer wavelengths like deep red and far red require less energy. Some LEDs have high efficiency but low QER like Nichia's 405nm UV which is almost 72% efficient but has a QER of around 3.3 and other diodes like typical 720-730nm monos have low efficiency but high QER. Many 660 monos have high efficiency and a high QER so they convert the most energy into light and have the highest umol/j readings. I'm sorry I'm not sure what Prawn was talking about regards the Emerson Effect. I'm sure he will explain.

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Prawn Connery said:

How about them? They're just like all the other Chinese bar lights. Same spectrum, same format.

Two of these will destroy a Gavita for less money – 740W power draw, "true" full spectrum (390nm-780nm), height adjustable at different levels, remotely mounted Mean Well drivers with 7-year warranty, made in Australia with Nichia (better than Samsung) and LED Teknik (better than Osram) diodes, and proven in grow rooms around the world.

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