You Have Found the Perfect Space, Now You Need the Best Cannabis Grow Room Lighting for Your Environment

Follow these simple steps to determine how to best calculate the lighting for your cannabis grow enclosure.

  • As a rule of thumb, it’s best to achieve about 50 to 75 watts per square foot. It’s really important to remember that these are target numbers and lighting needs to fall within this range. If you go with the high-end of 75 watts per foot, it may cause light burn on some species of marijuana plants, and lights may need to be lifted or dimmed a bit.
  • The square footage of your grow area is determined by the length and width, excluding any utility areas or walkways. Remember, you are only trying to light the plant areas of the grow room.

EXAMPLE: If your grow area is 20’ x 40’ which equals 800 ft.², then you would subtract any utility spaces. In this example. let’s say that the utility area is a total of 4’ x 40’ which equals 320 ft.². When we subtract the 320 feet from the initial 800 feet we are left with 480 ft.². If we use the wattage of 65 watts per square foot than we would multiply the 480 ft.² times 65. Therefore, the total wattage required would be 31,200. Once you understand the number of watts needed, you could use 32 1000-watt fixtures or 480 65-watt fixtures.

Note: There are numerous lighting manufacturers entering the marketplace. To be certain that you are getting the best lighting for your grow room needs, be sure to consult with the manufacturer.

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