how many lumens to grow cannabis

Wattage and Lumens of Cannabis Grow Lights

Generally speaking, the higher the wattage of the bulb, the more light it produces. The more light that is produced, the better your plants will grow. An excellent way to measure the amount of light you are getting per square foot is through the use of lumens. Wattage and lumens tend to go hand in hand, but can vary system to system. Even though lumens tend to correlate with wattage, it is the design of the light that can have drastic impacts on the actual amount of lumens emitted.

There are three factors to consider when deciding how many lumens you need. These are:

  • The size of the grow area
  • How many plants you have
  • How large your budget is

It basically comes down to this, the more lumens cast over your grow area, the stronger your cannabis plants are going to grow. Each plant will require an absolute minimum of 2,500 lumens. A standard 400W HID lamp will usually emit 45,000 lumens. This should be enough to comfortably grow up to 12 cannabis plants in a 1m2 area – with enough lumens to cause strong growth.

You will have to take the strain you are growing into account here as well, one large sativa may take up the entire area you would use to grow many smaller indicas. Meaning if you plant to grow a lot of sativas you will need a bigger area and more lights to cover them.

Whilst have 45,000 lumens within a 1m2 grow area will get you good results, having a light with a higher wattage that produces more lumens within the same area will help you achieve even better results. It all comes down to how much you want to grow, what lighting systems you can afford and what you are prepared to spend on electricity bills. The stronger the light, the more it’s going to cost you.

400W and 600W light bulbs are the favorite of indoor cannabis growers. Some growers even use light bulbs with 1000W. This is logical, when you consider ‘more light = bigger yield’. But watch out; the more Watts you use in your grow room, the hotter it gets. Especially with 600W and 1000W light bulbs the temperature can become way too high for your cannabis plants in your grow room. So be prepared to do some temperature control when using strong light bulbs.

An excellent way to measure the amount of light you are getting is through the use of lumens. Wattage and lumens tend to go hand in hand.

How many lumens do LED grow lights produce?

Mar 21 · 4 min read

What is the lumen in plants?
Lumen refers to a measure of the total amount of emitted visible light by a source. The total number of lumens varies according to the type of grow light, the type and number of plants, the total measurement of the area, the distance of the plants, and their height. If possible, you should also determine the current stage of your plant to know how much supplementary light you’d apply.

Moreover, if you have dec i ded to continue the process indoors, it is a must to know the preferable amount of lumens every plant should receive. Determining the precise number of lumens prevents any damages on your plant. Thus, supplies the necessary optimal light for their productive growth.

What is a Color Spectrum?
Plants are genetically programmed to grow using sun light, which we consider to be white light, or yellowish-white light. This light looks white because it contains all of the colors of a rainbow, and when these colors are all mixed together they look white.

Scientists use wavelength numbers to refer to the colors instead of color names, which is a much more accurate way to measure the color. So a red might have a wavelength of 630 or 660. Both of these look red to us, but they are actually different colors.

Plant biologists define light in the 400nm to 700nm spectral region as “photosynthetically available radiation,” or PAR. The unit for measuring PAR, micro-mols per second (μmol/s), indicates how many photons in this spectral range fall on the plant each second. Inexpensive PAR meters use sensors that respond over the entire 400–700nm spectrum and have their own sensitivity curves that require different calibration for sunlight, fluorescent and HID lighting. All these systems are too broadly responsive to measure an LED’s narrow emission spectrum. They make HID grow light seem brighter by over-measuring yellow-green light and make LED light seem dimmer by under-measuring red and blue light.

lumens per watt
In terms of lumens per watt, today’s double ended HPS grow lights are quite efficient compared to other types of traditional artificial lighting, producing over a 100 lumens per watt.

However, when we consider LEDs, light output has already exceeded 300 lumens per watt in the lab. Like most electronics, LEDs continue to increase in efficiency and decrease in cost per lumen of output.

How to Measure LED Grow Lights?
So, how should we measure LED grow lights? The strength or intensity of the light can be measured by the total wattage of the LED grow lights. The higher the wattage, the more intense the light will be. The coverage area of a grow light is another good measure of its strength. Another measure is the photosynthetic action radiation (PAR) output of a grow light, which measures the effectiveness of a grow light for plant photosynthesis.

Best LED Grow Lights for Sale 2020

Bring the intensity of the sun closer to your plants with the Low Pro Flower. Designed specifically for vertical and racking solutions at only 3” tall, this makes it the shortest, brightest LED grow light on the market today. Guaranteed to maintain 90% or better light output for 3 YEARS with regular use.

The New ECO Farm ECOX Vertical Farming LED Grow Light takes Vertical Farming into the new era. ECO Farm ECOX is the vertical farming LED Grow Light that is engineered to be superior and outperform all of the Vertical Farming LEDs on the market today.

Finding the commercial grow lights on the market doesn’t come easy. It takes countless hours of research and comparison — which I’ve painstakingly, but happily completed at your convenience!

If you’re wondering why you didn’t see other LED grow light brands or models on my list of the best LED grow lights — it’s not necessarily because they’re terrible, but because they were beaten out by the grow lights I did include.

What is the lumen in plants? Lumen refers to a measure of the total amount of emitted visible light by a source. The total number of lumens varies according to the type of grow light, the type and…