So now that you have determined the size of your grow area you need to know the lumens per square foot of your grow area.
Lumens per square foot grow room.
To do this you need to determine the amount of light first to know how many lumens it can produce.
Please choose proper unit of your room area to help us count led lights lux and watts calculation required per square foot meter inch.
A common mistake new growers make is measuring the dimensions of the grow room itself.
This lumen calculation formula is using predefined standard lux levels required for different room types.
L 538 2 4 1291 lumens.
When growing cannabis indoors our goal is to mimic the perfect outside environment.
Cannabis needs a minimum of 2500 lumens per square foot.
Minimum amount of lighting needed is around 2000 lumens per square foot.
In a nutshell lumens per square foot.
While this may be the case you don t need to hit the 10 000.
Knowing how many lamps you need to adequately illuminate a room or space can be tricky.
For example a 16 foot long by 14 foot wide room has a square footage of 224.
X 10 20 foot candles 1 000 to 2 000 lumens.
Calculating lumens if you re curious to know how much light a room is getting simply add up the lumens of all the light bulbs in the room and then divide by the room s square footage to find the lumens per square foot.
Calculating your grow lighting requirements really is just two steps determine your plant s lighting needs watts square foot and your plant canopy dimensions.
So for this example the square feet of your grow room is equivalent to 9 square feet.
Divide the total number of lumens by the efficiency of the bulb and round up to figure out the number of bulbs.
What you really should be measuring is the footprint of your plant canopy.
Three 23 watt cfl s per square foot optimal is 7000 7500 or higher lumens per square foot.
To put things into perspective the sun puts out 10 000 lumens per square foot.
Here s an example using a 100 square foot living room.
Multiply your room square footage by your foot candle requirement.
Then choose the type of a light bulb you want to use.
Once you ve measured the room and calculated the required foot candles it s time to determine how many lumens a space needs.
Our room example is a living room which requires 15 lumens per square foot.
For example a 10 foot wide 12 foot long room is 120 square feet 10 x 12 120.
Result may defer according to spacing layout of led lights and position from wall.
In addition to the size of the space a variety of factors such as the activities being conducted and wall reflectance can also play a role.
Then after that you have to divide.
Two 23 watt cfl s per square foot mid range is around 5000 lumens per square foot.
Let s assume you re using a standard bulb that emits 800 lumens for the kitchen and small led lights that emit 200 lumens each above the counter.
