New Light?????

oldleave53

oldleave53

Active Member
My question is in comparison to wattage. What wattage would this light I put together be putting out. The bulbs are 6 25 watt (100w equivalent). So would it be accurate to say its leaning more towards 600w or more towards 150w? :dunce:cfl light.jpg
 
What I'm asking is how many actual watts are my plants getting or should I just go by lumen's. Which would be 21,000. By the standard written on the bulb packaging.
 
A watt is a watt your running 150w of power and your NOT getting 21,000 lumens from 150w of cfl.......a 150 w hps puts out 16000 lumens at 125-140lm/w... cfl are closer to 65-75lm/w...oh and bring your DIY panel way closer to the plants.............good luck grower
 
watts don't transfer to your plant, they are merely a measurement of electricity. Lumens tend to not be a good standard to go by either, i'm no expert on the subject so hopefully someone else will chime in.
 
Just curious, but where did you get 21000 from? Even if each bulb gave 1700 lumens(which is what my 26w say) that's only like 10,500. What hyperan said is right. Also keep in mind that lumen output is per square feet feet, so the growing space is larger than that you aren't getting the listed amount of lumens.
 
billybob420 said:
6x25=150

Our youth are fucked.
Click to expand...

There is no need to be a wise ass. It was a simple question. I know how to do math jack ass. If your not here to help people but your just here to bash people then maybe you should go to another forum. What a winner you are. I am a VERY long way away from being a youth anyway.
 
Cloudz2600 said:
Just curious, but where did you get 21000 from? Even if each bulb gave 1700 lumens(which is what my 26w say) that's only like 10,500. What hyperan said is right. Also keep in mind that lumen output is per square feet feet, so the growing space is larger than that you aren't getting the listed amount of lumens.
Click to expand...

I made two of these lights and the box of each bulb says 1750. So that being said 1750x12=21000. And as far as the space goes Im not 100% sure I have the proper amount of light in the space or not. I have the 2 cfl light fixtures and a 2ft 4 bulb T5 in there as well. That is roughly 31000 lumen's for 8 sq ft. That is 3875 lumen's per sq ft is that reasonable? And yes I understand that you guys always say the more cfl's the better but I just got the tent and I just made the light so this tent operation has just started. Thanks for your help man.
 
PSUAGRO. said:
A watt is a watt your running 150w of power and your NOT getting 21,000 lumens from 150w of cfl.......a 150 w hps puts out 16000 lumens at 125-140lm/w... cfl are closer to 65-75lm/w...oh and bring your DIY panel way closer to the plants.............good luck grower
Click to expand...

Thanks, I have the light set that high strickly for the pic usually its damn near touching the plant. I do have two of those lights in here and going by the packaging of the bulbs they say 1750 lumens a piece. Now I'm not certain how accurant that is. LOL. But that is what they say.
 
them lumens will degrade over time. just so you know lumens is the measurement in which we see light. ie; 1 lumen = 1 candle light. the more lumens the better light penetration. with cfls u will want at least 100w per plant. but the more the merrier as long as u can manage the temps.
 
It's never going to be 100% accurate. I would assume it's more like 1500 lumens. Manufactures love to give the "best" amount of lumens possible, but unlikely to occur in reality. Not sure if I read it on RIU or grasscity, but plants want a minimum of 5000 lumens per sq. feet for optimal growth. Not saying you don't have enough to grow, but it's on the low side. Now if you can fit 12 of those in a smaller container what would be best, but for 8 feet 3875 lumens isn't all that great.

Just my opinion, but cfls really aren't the best for wide areas. You might want to look into HIDs. How are the temps when you're running all 12 vs just 6?

Also if you're running 12 your first post was a little misleading wasn't it? :P

edit: yea I would go with what brett says and do 100w per plant. the lumens per square feet is just another method.
 
oldleave53 said:
OK so thanks guys for the info. Appreciate your time.
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I would use your lower estimate. CFLs are reasonably efficient light producers, almost on a par with HID lights. Entirely ignore the "watts equivalent" hype because that is relative to incandescents, which are unsuitable as grow lights. Your competition is from T5s, HIDs, LEDs and the odd plasma light. My opinion. cn
 
Cloudz2600 said:
It's never going to be 100% accurate. I would assume it's more like 1500 lumens. Manufactures love to give the "best" amount of lumens possible, but unlikely to occur in reality. Not sure if I read it on RIU or grasscity, but plants want a minimum of 5000 lumens per sq. feet for optimal growth. Not saying you don't have enough to grow, but it's on the low side. Now if you can fit 12 of those in a smaller container what would be best, but for 8 feet 3875 lumens isn't all that great.

Just my opinion, but cfls really aren't the best for wide areas. You might want to look into HIDs. How are the temps when you're running all 12 vs just 6?

Also if you're running 12 your first post was a little misleading wasn't it? :P

edit: yea I would go with what brett says and do 100w per plant. the lumens per square feet is just another method.
Click to expand...

Wow what a let down. I apologize if I mislead anyone in the first post I was just asking about the wattage in a single light after I found the answer then I could do the math, but after this thread I think I'm just gonna junk them and stick with running T5's. They say its more efficient to run cfls so I bought another tent and thought I would give cfls a go. If you have to run 100 cfls verses running 2 T5's then it really isn't that efficient. It seems like it would end up costing more money in the long run. I guess the ONLY good thing about cfls is the heat issue.
 
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