Recent content by stardustsailor

They seem as pretty legit designs with high quality materials. What needs to be reworked is the different color LEDs arrangement /placement on the Wavy Boards & Fusion boards. Creating "zones" of the same color is not exactly the best way to create an "even" -regarding wavelengths -incident...

Totally agree. :clap: Quite a few people seem to forget that LEDs are actually diodes made of various semiconductor materials. And they behave like that. Let alone what happens from the light emission stage and afterwards ... :wink: Allow me,my brother ,to add few further notes. Wattage (...

Everyone has an opinion. You think that the reds do not cope with heat ,the reason why the blurple light is inferior to white . Fine by me. Something tells me that you 're quite willing to try and prove that you're right about this .. But ...Living tissues are way different than solid state...

I've used one Galaξ* Led grow light ,but instead of 6x Vero 29 this device has 4x CLU048-1212C4-303H6M3-F1 Version 6 and 2x CLU048-1212C4-303M2M2-F1 Version 6. The heat sink that the 6 COBs are installed is 40 cm long and 16 cm wide . The panel is not hanged that high ( due to low If =700 mA )...

Ok.You got me pretty impressed now. It seems that you're doing some fine job there. All is left to do -when you're finished with the device - is to put it in action. Once again ,electronic engineering -wise ,my opinion is that you are doing a fine job. But will it back up your claims ? That is...

Nowdays ,my favourite blend is 3000°K 80Ra and 3000°K 90Ra ,at a device ratio of 1: 2 ,respectively. ( I'm using Citizen CLU048 1212 for this blend of white COBs. ) I've some plants at 12/12 from seed and the COBs are driven @ 700mA . I've to say that it is the best blend I've tried ,so...

Exactly ! But that does not automatically excludes it from being necessary . If not obligatory in certain cases (say like under powerful artificial lighting ) . Typical efficiency of photosynthesis is 2% . By not supplying green light , efficiency drops way less than 2% . There's no way by...

Be careful here . Leafy greens like the ones in the pic have way different energy needs than flowering / fruiting plants. Leafy greens can be grown with several monochromatic LED combinations (depends on the wanted results i.e rich in antioxidants or broad leaves or ,or ..) But when it comes...

That I can understand. But keep in mind that this is more of a "scientific research " solid state light fixture you are mentioning.It's purpose is to supply different parts of electromagnetic radiation or their combinations in order to study the plants reactions. There are some light fixtures...

"We've been studying CO2 chemistry for a long time, more than 100 years, and there's very little evidence that we could do what a leaf does." Andrew Bocarsly ,Chemist ,Princeton University. https://www.scientificamerican.com/article/plants-versus-photovoltaics-at-capturing-sunlight/...

Been pretty occupied ,my brother. But I always find some time to sneak and take a peek on what's going on around here. Hope that everybody is doing better than OK.

Really dude ,I 've been reading most of your posts about light and it's utilisation from plants. One thing I've to say to you: Half knowledge is worse than ignorance . I do not mean to bash on you or insult you. I 'm just stating a truth .That's all. And I will give you an immediate / handy...

1 ) At 1500 μmol/sec/m^2 , Ta = 30°C and Atm.CO2 = 400 ppm the photosynthetic rate of Cannabis Sativa species is peaking . To take advantage of more light ,the other two factors ( Ta / CO2 ) need to be adjusted accordingly . https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3550641/ 2)...

Great work ,my italian brother ,as always . I'm getting old. I can hear the sound of silence ,by now . ;-)

Just take alook at the "Spectral Discrimination of Cannabis sativa L.Leaves and Canopies " pdf. At page 195 ,figure #2 . Notice that as cannabis plants move towards their end of life cycle ( towards peak of flowering /end of September ) the FR region . Light can be absorbed ,transmitted or...