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Didn't you add CFL?

It's ok for 2x2 foot.

You can't even give a rational response.

Quit crying. If people have the space and room for those big azz panels then there's no problem with it, which is an if. So it's entirely circumstantial. Most circumstances most likely still favour the proven DE Gavitas in big grows. The CLU550 from Citizen may already be slightly better but...

Now that temp and current droop are rapidly improving soon there won't be a need for monster panels (panels that are 16 square foot) to replace high wattage HPS anymore. The CLU550 from Citizen is already a 240 watt monster cob. (up too 500+ watt if you drive a higher current through it) 2 500...

http://rollitup.org/t/matching-drivers-and-cobs.883866/ HLG-80H-C700 most likely.

With the Vero cobs 4000K seems to be the most favoured for veg/bloom. With Cree it's 3500K. Lower also works. They both have plenty of blue for veg and more than enough red for bloom.

Pacific is Greengenes

600-700 watt replacement fixture for a Gavita is not worth it when you could replace 1000 watt of Gavitas with 1000 watt of COBs and get a greatly increased yield. More yield brings more money than reduced energy costs.

What is there to copy? It's just a COB a heatsink and a driver, optionally some fans most often in a case. In the end it's a fact that high quality cobs wether it's Bridgelux or Cree or Nichia or whatever are more efficient than DE HPS, depending a little on how hard the LEDs are driven...

Isn't it just a lot easier to skip the power supply for a PC fan and buy AC fans instead? They're just like PC fans except they run on 110 or 230 VAC

Both peppers and tomatoes will always bloom and keep blooming until their death. Lower colour temp does increase the amount the plants will bloom, but they're not picky about colour temp or photoduration.

Why would a protestant or reformed ever care about what the pope says?

Didn't you add CFL during the flowering? Or was that another plant

At what point does aluminum get too hot to touch? Currently waiting for some AC fans so my vero setup is currently cooling passively. The aluminum is too hot to touch, it should be able to handle the heat passively. Is it because aluminum can already cause burn wounds at 60 degrees celcius...

A lot simpler than wire nut

Again you go with your that Spydr vs DE HPS test. I already said those Gavitas could(should) have been pulled a foot closer to the canopy. The test is flawed, and some of the LED plants also got illuminated by the HPS which is an even bigger red flag which you can see in that video of the test...

It really really depends on the led of course. If he's talking about shitty Epileds, then he's probably right.

According to his amazon: "SPECIFICATIONS - Light output is 21.28 umol/s EPPF (Expanded Photosynthetic Photon Flux). Efficiency is 0.89 umol/s/watt. PowerBLUE® is NOT intended to be used as the sole source of light for plant growth." Compared with Philips 1000W DE HPS = 2.07 umol/s/dissipation W...

COBs will pull less voltage at a lower current. (They also pull less volt at a higher temp) See page 9 http://www.cree.com/~/media/Files/Cree/LED-Components-and-Modules/XLamp/Data-and-Binning/ds-CXB3590.pdf 1050mA isn't on the chart, but it looks very linear and extrapolating the graph will...