Search results

What Cree is doing with the CXA-HD line is cramming the dies closes together, this makes it easier to create tight beams since the COB becomes more point-source like. It used to be Philips that had the highest lumen density in COBs but on the Philips website this claim has now been dropped. The...

There would still be speculation about lens- and driver losses. What consumers of LED panels should start demanding is the PPF figure (umol/s) of the whole fixture.

They are running very low, about 220mA. But even with the vero 10 (3W of pure light) the leaves can be just a couple of centimeters away with no ill effect. I have found that extra magnesium prevents light bleaching to some extend.

PSU's link mentions 748W, here it is listed as 750W.

This Lemon Kush seems to like them more than you do.

Yeah it can't be mcd, I don't know what they could have meant. It's wrong in the lower table too. Take Chinese or Taiwanese documentation as far as you can throw it. These red and deep red chips from Epileds must be used on a massive scale (in the Cidly panels etc) and are likely growing more...

This is an error in the documentation, instead of mW they mean mcd. Anyway these red LEDs from Satisled perform well for the money and it would be a waste to just throw them away. About COBs and better light spreading: Don't forget about small COBs! For example Cree CXA1304, Bridgelux V8 or...

Somehow I missed an entire page in this thread. But EpiLED is using AlInGaP according to their (ancient) datasheets, see here or here.

I have a couple of dozen of those going and they are not so bad at all. There is an EpiLED chip inside. I did some crude caloric measurements of the radiometric efficiency and it's in the ballpark of 30%. They are slightly better than the 620nm from Satisled.

That spectrum is literally going off the deep end, must have been some stretched out plants.

The best Nichia of those is doing 140 lm/W (it's a 5000K with the "Rnn" designation). For reference a top bin XT-E 5000K is showing it's age with about 131 lm/W and a top bin XM-L2 5000K is doing a whopping 171 lm/W. This is all at 700mA, 25C.

No need to go all chemical... just supercharge your organic grow with some good fungi (mycorrhizae). Fabric pots might help too.

This requires two extra light-proof air passages. I think all three in parallel would be easier and do just fine. Btw, for my cabinet the airflow is fully serial, going from the flowering to the veg room so as to to warm up and moisten the air for the veg room. For me this was a lifesaver when...

Just remembered that you posted this pic of your plant over a month ago: That food container looks mighty small, could it just be an undersized rootball bottlenecking your flowers.

Yeah probably the higher metabolism from the higher light level exposes some sort of underlying deficiency. Something is becoming rate limiting.

Looks like the white is running at 800mA and the red at 600mA, am I close? Good to see the XPE red back again.

Hi Chronikool. What happened since last time is that tops have been getting heavier with the good stuff :weed: The stretching has thankfully stopped at 1 cm from the light. The star of the show are the two cindy's (C99), they are furthest ahead smell so so sweet. It is a joy to open the cabinet...

Power distribution is very simple (and safe............) with the Wago 222.

Sure, a realistic Tj is more like 50C; For the vero this would give a derating factor of about 0.96.

"par" is not a unit and the "par per watts" doesn't make any sense. I have no clue what they could mean by that. The metric that I like most is how many photons per second come out for every Watt going in. It is expressed in umol/J (micromol per Joule). It gives a better picture than just the...