Lumens, Lux, and Adding It all Up
- Thread starter ceestyle
- Start date
JayStrainHunts
New Member
Right This might sound extrely stupid but I am new to All this lumun stuff
I have 12W Cfl would it be enought to start of an auto??
I have 12W Cfl would it be enought to start of an auto??
Cannacat
Well-Known Member
I've tried really hard to understand all I've just read but my mind just does not work like that adn I can't work it out so I'm really sorry but I'm just going to ask.
I have 2 600w hps lights, are they going to be enough to get my 11 white widows through flowering or should I add more? I also have a 2 lamp T5, am I going to need that in there with them too because I could really do with that to veg my new clones under while the girls are using the big lights.
I have 2 600w hps lights, are they going to be enough to get my 11 white widows through flowering or should I add more? I also have a 2 lamp T5, am I going to need that in there with them too because I could really do with that to veg my new clones under while the girls are using the big lights.
kmog33
Well-Known Member
Depends on how big your space/ the plants are. With 2x600s you can grow 2-288 plants in a 4x8 ime depending on your grow style. 2x600s is a lot of light. 3 pounds wouldn't be too much to expect with a good yielding strain and the system dialed. 4+ once you really have your shit together.
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Cannacat
Well-Known Member
Hahahaha thanks so much for your quick response, you just made my day! Just did some quick maths and that'd be like a good year's worth of medicine haha
I can't give you the exact measurements cos it's just something we threw together and added to bit by bit, but I'm happy that the light is being fairly distributed between the girls; I do think I can improve on it further by making it more reflective in there, but I'm working on it.
Abiqua
Well-Known Member
sanjuan
Well-Known Member
I set up my first COB grow and adjusted the luminaires for 5000 foot candles at 20 inches (as measured by a Hydrofarm digital meter).
I turned off half the COBs for seedlings but they seemed to be stretching so I turned all the lights back on. The seedlings are now getting 3000 foot candles which I suspect is too much.
This post is from DesertGrow89 in August:
"Yeah start with a low light intensity, around 600-1000 foot candles for starting seedlings is great, two weeks later I like to increase it to 1500-2000, and progress to 5-6000 fc gradually."
Does that sound about right?
I turned off half the COBs for seedlings but they seemed to be stretching so I turned all the lights back on. The seedlings are now getting 3000 foot candles which I suspect is too much.
This post is from DesertGrow89 in August:
"Yeah start with a low light intensity, around 600-1000 foot candles for starting seedlings is great, two weeks later I like to increase it to 1500-2000, and progress to 5-6000 fc gradually."
Does that sound about right?
RangiSTaxi
Well-Known Member
Phone lux meters work fine, download a app, google store( light metre app) many to choose from. ive used even with blurpurple led,
veg 20000- 28000 lux any light source
40000 lux blurple for flower
48,000-58,000 lux HPS and cree 3590s budding at tops
dont go over 58,000 lux, or you will get chlorophyll degradation.
you will need a smart phone with a light sensor phone, like samsung S5 or above, clean phone lense and find the weak spots, adjust light for best even lux level across canopy.
dont try flower below 28,000 lux on any light source results will be below average
veg 20000- 28000 lux any light source
40000 lux blurple for flower
48,000-58,000 lux HPS and cree 3590s budding at tops
dont go over 58,000 lux, or you will get chlorophyll degradation.
you will need a smart phone with a light sensor phone, like samsung S5 or above, clean phone lense and find the weak spots, adjust light for best even lux level across canopy.
dont try flower below 28,000 lux on any light source results will be below average
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Wildoafi33
Member
Good post
Critical420
Member
Here's a great way to determine how close should you place your lights to the plants. Take your lumens meter outside on a hot 85-degree day and point the meter up to the sun. Whatever that value is on your particular meter can be used to determine how close to place your lights above the plants.
Craigson
Well-Known Member
Sorry way too much to just scroll and read through. And search brings up way too much.
Whats the best k rating for HPS in flower?
I ordered 2x 600watt hps and they come with 2100k bulbs.
If it matters I will also have my 315w cmh which I have both a 3000k and 4100k(could b off by 100) bulbs so I can use either.
Thx
Whats the best k rating for HPS in flower?
I ordered 2x 600watt hps and they come with 2100k bulbs.
If it matters I will also have my 315w cmh which I have both a 3000k and 4100k(could b off by 100) bulbs so I can use either.
Thx
herballuvmonkey
Well-Known Member
Craig the color temp is fine as I run 600s with 2000k Apollo horticulture bulbs and haven't had a prob except they degrade pretty quick. Maybe 2 grows out of em before they gotta go. Get yourself a lux meter (Amazon approx. 20 bucks) and hold it at the tops of your plants and it will give you a lux rating so you can tell when its time to change out your lights. This also depends on the size of the growing space so take that into consideration., If you wait til they start to look dim its too late.
herballuvmonkey
Well-Known Member
Not trying to sound like a douche but I dont think that is correct. 100K lux is approx. 9200 lumens per sq foot. I flower at 90K lux with no bleaching or problems. The power of the sun is 10k lumens per sq ft so I try to stay close to that. It is easily accomplished with a 600 watt hps in a 3x3 tent. Running this and a scrog normally get ..5 to .6 grams per watt (300 to 360 grams for 1 plant).
herballuvmonkey
Well-Known Member
1 lumen is = to 1 footcandle. 1 footcandle is also equal to 10.76 Lux not lumens.
I hate to bring negativity to this thread, and disagree.
But lumens is just how bright light appears to our eyes. Lux is just another measurement of lumens. Lux, is a measurement of lumens intensity of an area. I'm pretty sure one unit of lux, is equal to one lumen per m2.
Plants don't see light. They only absorb PAR (photosynthetically active radiation). If you don't have a PAR meter, you're guessing.
But lumens is just how bright light appears to our eyes. Lux is just another measurement of lumens. Lux, is a measurement of lumens intensity of an area. I'm pretty sure one unit of lux, is equal to one lumen per m2.
Plants don't see light. They only absorb PAR (photosynthetically active radiation). If you don't have a PAR meter, you're guessing.
since1991
Well-Known Member
Yes. True. But if all you have is a lux/footcandle meter..it will suffice. Plants see par and those are the meters you want but they are spendy. If all you got is a regular ole footcandle meter..and you see bulb degradation or consistent reads..if pretty safe assumption that this correlates to PAR as well.
thccbdhealth
Well-Known Member
Since you all seam more knowledgeable then myself;
What is the consensus on the new 600w Hortilux Ceramic HPS
What is the consensus on the new 600w Hortilux Ceramic HPS
swedsteven
Well-Known Member
Hum ...
I aim for 70 000 lux this grow and my bud are bigger then my 50 000 lux grow
I will go softer like 40 000 lux for the last week .
Im using 50 watts cob × 44 50watts each square foot
I aim for 70 000 lux this grow and my bud are bigger then my 50 000 lux grow
I will go softer like 40 000 lux for the last week .
Im using 50 watts cob × 44 50watts each square foot