Grow tips to know when using led grow lights

How do I determine the right light for my grow area?

Measure the floor space. Multiply the length times the width and this will give you the square footage. You should be able to get decent results with 30-50 actual watts of power per square foot.

And when you decide to use grow tents for plants, it's time to find out what size of the grow tent you need for your plants.


For larger areas should I go with a single large led grow light or multiple medium to small grow lights?

Using multiple lights allows you to better distribute the intense light in more areas of the grow space instead of having all of the higher intensity light concentrated in only one area while the outer edges never receive intense light.


Recommended LED Grow Light Distance Above Plants

Germination: 24" (60cm)

Seedling: 20''-24" (55-60cm)

Veg: 18"-22" (45-55cm)

Flower: 12"-18" (30-45cm)


Recommended Dimming/Brightness Level

Precondition: the hanging distance at 12’’-18’’

Germination: 25%; Seedling: 25%-50%; Veg: 50%-75%; Pre Flowering: 75%-100%; Flowering: 100%


For the exact instructions on hanging distances and dimmer settings of Mars Hydro LED grow lights, please refer to Mars Hydro FAQ Page


Recommended Lighting Schedule

Seedling & Veg: 18/6(on/off), or 20/4(on/off) for clones

Flowering: 12/12(on/off)


Recommended Growing Conditions

The rate of photosynthesis and transpiration is directly affected by temperature, humidity, and airflow.

The perfect temperature and humidity for your plants are found between 75*-85*F and 50% - 70% humidity, with plenty of airflows to replenish CO2 (carbon dioxide). PH is 6-6.5. You may add more calcium and magnesium than normally needed when using HPS, and less watering.



Do LED grow lights harm humans?

The light may be too strong, please wear your sunglasses when looking directly at it or when working under an open LED light for a long time.

A small amount of UV light does NO HARM to humans.


What are the darker red LEDs on my LED grow lights? Are they dead LEDs?

Some LEDs seem dim. They are IR LEDs (Infrared). The human eye can not see IR very clearly, but you can wear sunglasses to check.

Appropriate IR promotes robust stem growth, proper node spacing, and more flowers and fruit, increasing the rate of photosynthesis via the Emerson Effect.


What's the most important part of LED grow lights?

The LEDs. To be exact, the LED chips. LED chips are light-emitting units. Different brands, series, and standards of chips will lead to different efficiency, stability, and quality of the LED grow lights. Now the best LED chips in the market are built by Samsung and Osram.

Check more about what are the LED chips doing in LED grow lights.


Please be careful not to sprinkle the nutrient solution on the light board, it may cause corrosion of the light board and diodes.


We will update this blog from time to time with new tips.
If you have any questions on how to use LED grow light, welcome to leave a comment.