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Monster cropping


Jland
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Eish sorry Jland[/member] your monster cropping thread has been jacked.

 

@DoubleR perhaps make a new thread if you're looking for more info; Mars and [most of] the rest use those Epistar diodes. Regardless of what brand it is, it is essentially the same fixture. Potentially different drivers, but the drive currents are likely similar. Most of their stats can be thrown away, perhaps there are some with legitimate data, but it's unlikely. 

 

Need to look at the actual wattage draw, which even then is often not what you get. Marketed 200W draw, may pull only 150W and some of that is lost to driver heat etc.

 

There is no PPF data anywhere, as far as I know, nor data on efficiency for the Epistar diode lights. I think Growmau5 once hypothesized 0.9 umol/j which is really bad, HID blows it out the water, CFL/T5 comparable. This is why "old fart HPS users" have not bought into LEDs over the years and only now with more quality fixtures are actually considering it. 

 

Reputable COBs (Cree, Vero, Citizen) are the way to go for LEDs, or quantum board type tech have higher efficiency and much better heat dissipation, but really expenny and still quite new.

 

There's pretty much only one supplier in SA, Make Light, lots of kits internationally, Rapid Led, Timber grow lights, Chilled, Pacific light concepts, Cutter electronics, etc.

 

TL;DR: you will get better penetration with Mars, etc. than CFL / T5, but the efficiency is so bad, wattage is much better spent on HID and very arguably CFL / T5 in a SOG or SCROG setup. If you want LEDs, go by PPF, be wary of lux and PAR wattage claims on Mars et al, they are very misleading.

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All good Narina, this is good info!

 

Growmau5 knocked that last grow out of the park with the comparison of MamathP and the other product (can't remember). Think he pulled close to or over 1.5g per watt!!!! SICK!!! 

 

Quantum does perform and he has put some nice boards together with step by step instruction, his a trooper!

 

:-peace

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Ya much better tech. Quantum boards using the Samsung S5 and S6 diodes and there are fixtures with the Cree (XP2 I think?) diodes. Not sure what the larger higher end lights like Spydr etc. are using, but they're still less efficient than the QBs. Would be remiss not to mention the Sanlight fixtures which have been featured on forum, and on paper look comparable to the QBs.

 

COBs are a bit crazy, but really really effective.

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