HydoDan
Well-Known Member
My 300 watt 3590 6 cob light runs my tent at 74f... without the reflectors on I have it 12" from my canopy.. less than half the heat from a 400 w hid.. No dead or burned leaves!!!
Is there so such thing as TOO much light?
- Thread starter datshieeet
- Start date
Uberknot
Well-Known Member
Running at 50w each at 12"? Hell If I did that my plants would fry with my 4 cobs.
As a matter of fact I can go to about 37w 1.3-1.4 mA or so each at 24 inches. 2 x 2 tent 5.5 feet tall.
datshieeet
Active Member
Unfortunately I too am confined by space restrictions. I am pretty sure I'm going to go with an LED light, I know nothing about LECs. BUT I will check them out before I make any purchase.
Now that I know a good average is about 50watts per square foot, I realize that the one I was about to purchase will be too strong for that area. Thanks for the info!
HydoDan
Well-Known Member
I wonder why we are getting such different results?? I have a 48" bar with 6 cobs spaced at 8"
The plants were vegged outside for 3 months.. I brought two inside and cut them to fit into a 2x4x7 ft.
Tent. That was three weeks ago and I hope they don't get any bigger..lol I'm topped out!!
Is your power supply mounted to your frame?? I have mine outside the tent...idk??
Uberknot
Well-Known Member
Whats your power supply? mine are about 6-7" apart.
It might be to to space and reflective light.
875 mA I am at 20,000k lux at the top of the pots from 32"
Uberknot
Well-Known Member
OK so it's set at max all the time 1.4 amps? 12 inches is really close for that amount of power.
AT 1.75 A I get over 78,000 lux at 24 inches. 1.4 A about 56,000 lux at 24 inches.
4 cobs on a 240 1750 this is a testing pic.....temps are not a problem as long as I run the air.
But the amount of light is......can cook the leaves...if not far enough away I am still learning how to set it.
That is a 12 inch square piece of 1/4" thick 6061 type grade aluminum.
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Uberknot
Well-Known Member
Yeah dimmer adjusts how bright it is and how much amps.
Uberknot
Well-Known Member
Ok, I got a real lux meter today so I am testing atm....a tablet lux meter is not very accurate when used around an area like a lux meter from everything I can tell. Also those peak readings I was getting are only in the very center of the lights straight down it's like a hot spot there. ATM testing with max 1750 mA and getting around 55k-60k at 24 inches. If I move the lux meter to 12 inches maxed 1750 mA I get around 110,000 lux SO it's not quite as bad as I thought thank god....
Now back to testing!
I can say this much I am so glad to have a light meter right now!
Now back to testing!
I can say this much I am so glad to have a light meter right now!
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HydoDan
Well-Known Member
I just made the change to cob leds and haven't had enough $$ to get a light meter or watt meter..Ok, I got a real lux meter today so I am testing atm....a tablet lux meter is not very accurate when used around an area like a lux meter from everything I can tell. Also those peak readings I was getting are only in the very center of the lights straight down it's like a hot spot there. ATM testing with max 1750 mA and getting around 55k-60k at 24 inches. If I move the lux meter to 12 inches maxed 1750 mA I get around 110,000 lux SO it's not quite as bad as I thought thank god....
Now back to testing!
I can say this much I am so glad to have a light meter right now!
spent all my $$ on the cobs.. Lmk on the testing!
Uberknot
Well-Known Member
The Light Meter was $19.99 and it measures the sun no clouds at around 118,000 lux which is spot on.
Also picked up some really good Colloidal Silver as well.
420GScookies
Active Member
I had a 600W HPS in a closet.. Too much light is very possible. Had to learn the hard way about light bleaching.