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Why are you arguing about math with me when you use your growing experience as an argument ? It makes no sense whatsoever. If you wanna beef someone, try someone else. And what's with all that gangster talk ? "Put up or shut up" Seriously ? Are you not willing to understand what I was talking...

Those cobs drivers have an efficiency of 96% or so, so if I say that a cob has 50 watts, it has around 50 watts. Doesn't bother me at all. Those cdm/hps/mh drivers also waste energy, so your point is pointless.

Nah it's most likely two bulbs with 315 watts and around 50 watts per led/cob

It's not even possible to visit your profile chiquifella, so what the hell ?

I just remembered why I hate those forums. I migrated from the german/swiss grower.ch because of all the negativity and people abusing the platform to live out their personality issues, but I see it's no difference. Shame on you.

fml

Are you done ?

Yes, you have to pay the shipping. But because you have to pay it it will be delivered by express courier. And they won't write down the actual worth of the package if you tell them not to. I ordered there and I just payed the 2% paypal fee and the 20 dollars shipping in addition to the set's price.

I can't add links just yet. Just search google for: kingbriteled. You will see his alibaba vendor page as a result. They also offer those growkits without stealing money from you ;) Instead of 450 you pay 270 for 5 cxb 3590 and you have reflectors, holders and passive cooling.

This isn't really my field of expertise. I only know how much light plants can handle under regular circumstances.

Do you buy the panels or the diy kits ? Because this shop is very overpriced. Edit: TintEastwood already said it: kingbriteled is your supplier =D They even fake the invoice upon request so your 500 dollar cob package becomes a tax free mp3 player for 20 dollars :bigjoint:

Where do you buy them ?

Either you get yourself 4 of those cdm with 315 watt or you get yourself 25 cobs and build a panel with 5x5 cobs @ 1,4 amps.

Yes. 20 cobs replace 500watt hps/mh or equal a 1000watt double ended (cdm). Yes, but that would be overkill. As long as you don't use additional Co2 in your growroom your plants can't use the large amount of photons. 9 cobs @ 1 ampere are sufficient on 4x4.

You can just take the stem between your thumb and another finger and start squishing it. The stem will become soft and weak so you can bend it over by 90 degrees. The stem will then become very hard and thick, thus stabilizing the now horizontal branch. Been there, done that, because a silver...

I found it, it's called: Philips CDM Green Power 315 Watt 3100k This bulb is really nice, but it's neither a hps nor a mh, it's a cdm. It produces the same kind of light tho. You can buy this bulb and you're good, it's excellent. It's also very expensive because you also need a driver and...

Is this still hps/mh technology ? Because I've seen this crazy 315 watt cdm bulb you can purchase, it really comes close to the efficiency of the cobs.

Which area do you wanna "enlighten" ? :D The sweetspot between efficieny and price for building a panel is running each cob at 1,4 amps ~50watt).

5W Epiled/Bridgelux are still crap, now matter how efficient you run them. Even if they weren't: The light distribution is still shitty, because the leds don't have reflectors. It's just overpriced garbage from china. THIS is led power (~190watt / 47,5 watt each):

Sorry to kill your mood, but those panels are just fancy and overpriced scrap metal of tomorrow. There is no way that these monocoloured leds outperform a cob. Cobs don't even need this shitty mixing of colours, they provide a full spectrum like a hps.