Recent content by MrFlux

They are 60 cm long, 16 cm wide and 14 cm high. The volume is 9.5L. They are from Elho and cost about 3 euro. The small pot size works because of the living soil inside. The beneficial fungi have turned the soil into a tight sponge-like mass that would not even need a container any more: It...

Small update of the cab this morning 20 plants flowering in a 4x5 grid. Blue Dream day 47F on the left, then a blue dream day 2F, then a C99 day 13F and on the right a blue dream day 40F. The big blue dream This thing is top heavy. The flavor and potency is already there and I plan on...

Thx for the correction Guod. If XP-L has the same die size then it's a bit disappointing.

The graph nicely shows that XP-L has less current droop (from better process/design) but also a worse I-V diode characteristic (from smaller junction area). From eyeballing the curves the two effects roughly cancel out, giving XP-L and XM-L2 about equal efficiency. Speculating a little, it seems...

For full closure can you tell what size RP it was and do you know the temperature it had when running?

No that's a constant voltage driver and what you need is constant current. For example LPF-60-48, LPF-90-48 or LPC-60-1050. These also come in a dimmable D versions.

Gaies used that 1:3 mix as well. It's spectrum is nearly identical to the glorious Vero 4000K

IMO just through every light you have at your plants...

This was the closest I could find. The blue action spectrum seems to be very similar for most plants though, just like the McCree curve. Okay. Let's choose from the CXA3070 group, lowest CRI, highest bin. So it will be 3000K AB bin vs 4000K BB bin. They cost about the same on Digikey and seem...

It puzzles me what sort of configuration you have if you measure 76.6V. That looks like 3 soft running Vero 10's or something. The Meanwell B model should indeed be running at full 100%.

The width of the blue peak is kind of typical compared to other white (and blue) LEDs so that's not something to worry about. It has proven to work very well. Some slight hairsplitting is the location of the blue peak, at 455nm. The blue action spectrum has a local dip there which means that...

Looks good to me. Your Tc gets 44C above ambient, that's a bit better than what I get. You T-bars are 50x50mm and mine are 30x30mm so that might explain. When you get some air flowing along the bars the temperature will drop a lot. This will improve the efficiency of the light by a few percent...

That goes for monochromes too, not sure what your point is. My point was that it's just as efficient to get your blue from whites as from monochromes.

About the mixing of whites, I can think of three ways to look at it. 1. When mixing whites you put a little bit more phosphor on some LEDs and a little bit less on the others. Like CH said you could have put some in-between amount of phosphor on all the LEDs to get the same effect. 2. Using...

The blue light from white LEDs is the portion of light that didn't get absorbed by the phosphor. There is no efficiency loss really, it's just as good as getting the blue from monochromes.