Lighting

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grow lamps
A friend told me he uses a 315CMH and it works better than a 1000w LED any ideas? I am thinking abou…
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    spiderdog35
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  •  · hlg has some good led lights i have the r spec with uv bar in a 4x4 it does great i also have the sc…

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Empty
Do I need eye protection around Led lighting ?  
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    Dee bud
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  •  · Wise choice you’ll like them 
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Dwc light schedule for autos
I usually run the lights on a 19/5 schedule for soil grows . Since I'm trying out DWC should I incre…
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    Izigrow
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  •  · 20/4 Option for @ to gain growth and bloom
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ppfd charts
newer site and not too many tests done yet but this site seems to do a fairly good job with their pp…
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    miggs
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  •  · either/or , anyways , light spread out/diffused evenly and as efficiently as possible is our goal i …
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sf-4000 warning , please read if you have one
Spider farmer SF-4000 appears to be a fire hazard. | Rollitup
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    M
    Mr. North
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  •  · Glad I went with -PARFACTWORKS 1000-....been a solid little light for veg. Good to know tho!!.
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Really good read
Hardly anyone includes autos but this did, surprised me.  I know I know    https://www.420greenthumb…
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    Rick
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  •  · just judging from my last grow they are not going to pernitrate like an HID. Just aint no way. So I'…
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Spectrum king
Anyone know much about this brand of led lighting? 
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    Pipeman69
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  •  · I'm a fan of sk lights and also big on their customer service!  A good choice if your looking to spe…
  •  · CPW
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  •  · Lighting
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Do Watts Matter?
Do watts from the wall matter? The old rule of thumb was 25 watts per sq ft was the minimum for flow…
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    CPW
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  •  · Yes it helps, we seem to be on the same page. I think you could cook a turkey under the center on so…

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Light vs Heat tradeoff
I have a question I can't seem to find the answer to. Perhaps you can help me. I understand that tem…
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    CPW
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  •  · Probably not, it depends on the leaf surface temperatures. What I look for is the Leaf VDP, I was no…

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LED INVENTOR
I did not know this, and I was born and raised in Illinois. We all have a little inventor in  us.  …
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    CPW
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  •  · This is Chubby post. It is good info 

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Last week to 10 days
Has anybody tried goin from 12/12 to 18/6 for the last week to 10 days of flowering. The theory that…
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    CPW
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  •  · I have not, yet, but I would be interested to hear how it goes. Seems like it could work, especially…
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PPFD range
 PPFD = 735 to 757. I do not have co2. So what would be my limit 850 or 900? She is flowering at the…
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    CPW
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  •  · I think your numbers are better for keeping it safe, no way will the SF2000 I bought cover a 2X4 can…
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