What Size LED Grow Light Do I Need?

LED Grow Lights
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LED grow lights are a critical part of any indoor growing project.  It is important to make sure there is enough light the grow room. The total wattage of the grow lights and the size of the grow room are important factors. In some cases, this may be more, but know that it all depends on the size of the growing area.

How Much Wattage per Square Foot is Needed to Grow Plants?

A minimum of 20 watts per square foot of grow area is suitable for indoor growing with LED grow lights. The wattage can go up to 50 watts per square foot, after which the intensity of light will be excessive for the plants. When growing with Dorm Grow LED grow lights, check the recommended coverage area for the G8LED grow light to make sure the grow area is properly covered.

For example, the G8-900 covers a 6’ x 4′ area, which serves as a guideline that helps to plan requirements of the space. Just know that depending on the requirements or the specifications of the project, increasing the light or decreasing it is possible.

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Understanding the Wattage of LED Grow Lights

In terms of the wattage of these lights, you need to consider two important things, the input power draw as well as the nominal wattage. The nominal wattage is typically used in the name of the light and is the total amount of the watts if the chips were operated at 100% capacity. Since diodes are never operated at 100% capacity, to avoid thermal breakdown, the actual power draw or input power is always less than the nominal wattage. For example, a 3-watt diode chip will operate at 1.8-2.5 watts, depending on the wavelength of the light emitted. Hence, an LED light called a 600W light will have an input power of about 350-400 watts.

What is the Best Chip Sizes for LED Grow Lights?

LED diodes are available in different chip sizes, from 0.1 watts to 25, 50 or 100-watt sizes. For indoor gardening, the best chip size for LED grow lights is the 3-watt chip because it has a nice balance of penetrating power, yet is very stable and low heat generating. The 1-watt chip is also good but penetrates less than the 3-watt chip.

Some grow lights use 5-watt or 10-watt chips, which have onerous drawbacks such as excess heat and the requirement of larger heat sinks.  High quality LED grow lights such as G8LED lights are mostly designed with the ideal 3-watt chip size. Today, most indoor projects prefer using 3-watt chips, simply because it creates a better balance between the canopy penetration, the heat emission, and the cost.

Larger chip like a five or ten-watt diode will require the light to have a larger heat sinks, resulting in a much heavier and bulkier light that is actually less stable in terms of diode longevity.  Before fitting your grow room with the best LED grow lights, choose a reputable brand, go through the power capacity of the lights and examine the specifications.

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