output

Hi! I bought a new fan a few weeks ago, Panasonic FV-20NLF1 WhisperLine 240 CFM. It's very quiet, but I have put a speed controler on it because it blow too much for my little tent! :laugh: But with it I have the "hum" noise from the fan. I've read that a Variac would make no noise, but...

That's an interesting question. Does the power output change anything besides the potential output? What's the effect of efficiency? This product: Some LED's claim to be 45% more efficient than the average 1000w fixture which to me is a power efficiency not growth benefits. Would love some...

I'm curious if anyone measures their runoff TDS and PH? How should the output compare to the input?

hey hey, I was reading luckiestman13's grow journal and was inspired by it and my brain to respond. it got so long winded that I decicded to start a new thread with my response instead, out of respect for another growers journal. hence the title "unplugged" from his journal basically. lol...

High All, I am looking for the forums input on which light performs better in a 4x4x7 tent LEC or LED? It appears Cree cxb3590 have an edge over LEC in efficiency and lumen output, Would you agree LEC has advantage over the cobs in UV spectrum? Which should I embrace? LEC or COB LED?

Bug zapper UVB output measured Today's evening sun's uvb output measured 67 mw/m2 Wiki has the Sun's uvb output measured @ 74mw/m2 It has a 10 inch dual tube 85va draw florescent type bulb The UVB strength reached over 580mw/m2 but the photo was under exposed. This is more then 7x...

I have access to very high output LED light fixtures for commercial applications. High bays and street lights.They come in the standard "kelvin" colours. 2700k, 3000k, 4000k, 5000k and 6000k, I am considering using a 5000k,240 watt fixture that produces about 28800 lumens for my 2x4x4 grow box...

I am currently experimenting with a small grow setup using 6000K ( temp actually closer to 6400K than it is to 6000K) 55W (47-50W) actual output rated Automotive HIDs as the main light source. So far so good. Because I am distributing the heat over multiple (4 total) individual lamps I can keep...

I'm thinking about getting this off amazon to improve the flowering stage of my plant. It is big and healthy with lots of buds all over but they are small and airy, not filling out. I don't think it is getting enough light. I'm using a 300w LED (I think it is only 130w actual output) and 6 100w...