How much area does a 1000 watt
grow
light cover? 1000-Watt LED Grow Light Cover The average LED grow light draws about 32 watts to cover 1 sq ft for flowering. Compare this to a typical HID fixture which rings in at 40 watts per square foot (assuming a 5’ x 5’ area, or 25 sq ft coverage area). Using an HID in a 4’ x 4’ will bring the power coverage up to 62.5 watts per sq ft. (The energy saving that growers can expect from using LED grow lights instead of HID is around 38%. This energy savings only takes into account to savings growers gain when using LEDs fixtures. It does not account for other environmental factors where growers can save energy. For example, less ventilation and air conditioning may be used, or foregone completely, depending on the size of the setup and ambient temperatures. Total power savings may rise above 50% in certain scenarios.) Different LED grow lights will have different efficiencies. More efficient LED grow lights will use fewer watts to emit the same amount of light that a less efficient LED grow light will exude. Therefore, as mentioned above, wattage is not the most accurate tool to know how powerful of a grow light you need for a particular coverage area. LED Wattage Chart Explanation The wattages listed below assume you are flowering your plants. If vegging, you might consider reducing your wattage by 50% since vegging plants only require about half the light intensity. As always, it is best practice to follow the manufacturer's recommendations. Using the charts In each chart you will find the following columns: '# of Plants' to be grown Square footage that the respective number of plants cover Recommended LED wattage for the number of plants grown in the respective space Wattage charts Assume about 32 watts/sq ft (actual LED wattage) for flowering. Fewer watts might equate to smaller yields while more wattage may lead to larger yields.
Area
Wattage
1' x 1': 32 watts (~30 to 40 watts) 2' x 2': 128 watts (~120 to 140 watts) 2' x 4': 256 watts (~240 to 300 watts) 3' x 3': 288 watts (~250 to 300 watts) 4' x 4': 512 watts (~500 to 650 watts) 5' x 5': 800 watts (~700 to 900 watts) 4' x 8': 1024 watts (~900 to 1100 watts) 6' x 6': 1152 watts (~1000 to 1200 watts)
1000-Watt HID grow Light Cover 1000W MH/HPS grow light Coverage Area: 4′ x 4′ (1.2m x 1.2m) up to 5′ x 5′ (1.5m x 1.5m). How Far From Plants? Keep 21+ inches (53cm) away from tops of plants Average Yields: 500 – 1000 g (17 – 35 ounces) – less for beginners, more for the pros – get the biggest yields by filling the entire grow area with a wide even canopy and remember that the strain (genetics) you grow with also makes a huge difference in your final yields Note: 1000W is the biggest standard HID grow light size. A 1000W grow light is extremely powerful but can also get very hot. To prevent heat problems (which can adversely affect your plants), it is important to set up an exhaust setup or some other way to control temperature.
If you know how large your grow space is, you can easily figure out which light(s) will best cover it. The following are the approximate maximum coverage areas for the most common wattages of MH and HPS bulbs: 150 watt: 2 x 2 feet (or 4 square feet) 250 watt: 2.5 x 2.5 feet (or 6.25 square feet) 400 watt: 3 x 3 feet (or 95 square feet) 600 watt: 4 x 4 feet (or 16 square feet) 1000 watt: 5 x 5 feet (or 25 square feet) From that, you should be able to figure out which size light is best for you and how many you need. All else being equal, 600 watt HID grow lights are the most efficient (meaning you get more output per watt of electricity used) and 1000 watt bulbs are second best, so you always want to see if those will work for your space first.
For example, say you have a space that is 10 by 20 feet, or 200 square feet. That is perfectly divisible by 4 (the 150 watt bulb) or 25 (the 1000 watt bulb). That means, you could light the area with 50 bulbs of 150 watts each (200/4=50) or with 8 bulbs of 1000 watts each (200/25=8). The eight 1000 watt bulb option is far preferable. That said, you could also light the area using 600 watt bulbs. The area is not perfectly divisible, but 200 divided by 16 gives you 12.5, so you would just use 12 or 13 fixtures and make them fit. In this case though, I would go with the 1000 watt option, since 8 of them perfectly cover the area.