Search results

CFL is pretty much obsolete though.

decibel is logarithmic, an increase in 10db makes it 10 times as loud. So 10db times 10 is 20, something 100 times as loud as 10db is 30db. 2x17db would at most be 20db.

Should be pretty close to unhearable at 2-3m distance. As long as it's really 17 db

Far red and near-infrared are synonyms. (the visible parts of it, mostly) Far red is infrared, specifically between 700 and whatever.

If you want something relatively cheap and you think HID is too scary, philips led bulbs are a better option than cheap chinese panels.

I don't think the efficiency is that much of a problem honestly. If you buy drivers from Alibaba you save money to buy extra COBs and drive them lower, so with the same system cost you may actually be able to achieve a higher efficiency. But this depends on a number of factors, but lower driven...

They're inefficient epistars/epileds And more expensive than a similar wattage Citizen chip. May as well just buy cheap LED bulbs.

CXB3590 is 160+ lm/w at 50 watt. CLU48 1818 too. Vero 29 gen 7 is higher. The Cree XP-G3 high power LED is also very efficient. Running it at 1 watt will always get it to 160 lm/w+ (even at extremely high temps) (S5 bin)

Being able to flower tomatoes is telling enough.

Thanks, I can see it on a few PCBs now, a lot are really shitty photos with the text barely visible. :lol:

I never said you needed the biggest, the 3070 is just no longer a top choice compared to cheaper chips that can do the exact same. And if there are still people making diy 3070 builds, then so be it. It just isn't a very reasonable choice when there are cheaper alternatives that are on par with...

Seems like 5630 should be compatible with "5730" boards, they just avoid patent issues that way. It was what confused me the most. Now my main problems seems that most sellers don't list how many are in series and how many are parallel, but some do luckily. I have time plenty

So where do I get bare PCBs for the Samsung 561C chips? Am I correct that I should look for "5630 PCBs"? And not in a way that I have to order 1000 pieces from Alibaba Or maybe I should stick with XP-G3s.

Was some time ago when I last checked prices. But while the cobs may be equal in price when it comes to PAR/$, if you want the same efficiency you need more 3070s driven lower in which case you're going to pay a premium for more pinfin heatsinks. (and to a much lesser extent the holders) And...

UVA/B is only helpful during flowering in not very big amounts. Small amounts increase THC production (natural sunblock for the plant), but too much will cause damage.

That bulb is really underpowered. Better go to homedepot or a local equivalent and get some regular 100 watt equivalent bulbs.

Nobody actually even uses 3070s anymore. At least not the diy community. (unless old builds) But Epistars have shit quality controls and just aren't better.

Are there any decent cheap alternatives for meanwell drivers

My whole problem with Platinum is that they're a dishonest company. Iirc they also got kicked from 420magazine because of wrong/dishonest claims, and 420 has always been a site tolerant to their sponsors. If it's already bought, then no harm in using it even if it will eventually be a...

Crap is all relative. For the price Platinum (Blackdog too) should perform a lot better than they are performing. 1 gram per watt is something you should be able to achieve with generic 80 lm/w LED bulbs (With the diffuser popped off). And 1 g/w is something experienced growers are doing with...