How To Choose The Best LED Grow Lights?

When you buy LED grow lights, there are many different factors to consider before determining what is best. You have to think about the type of light, what crop you are growing and how much light output is needed, the spectrum of light, how big your operation will be, and more. Between LIGHTOFGROWTH’s 240w Dimmable Full Spectrum Grow Light 4 Bar and 1000w Dimmable Full Spectrum Grow Light 10 Bar-MAX high-output and dimmable grow lights, all of your lighting needs can be covered regardless of what type of growing you are doing.

Types of Lights

The main three types of grow lights are LED, HID (HPS/MH), and Fluorescent. Each type of grow light has its pros and cons, but when all is said and done, we believe LEDs are the best overall investment for producing high-quality crops for the best cost. As shown below, LEDs typically have a higher initial cost upfront, but you save on the long-term operating costs. However, with LIGHTOFGROWTH’s direct-to-consumer model, we offer top-quality LEDs for nearly half the cost of competing LED lights. So, the time to recoup your initial investment in LEDs is much shorter.

Light Emitting Diode

High-Intensity Discharge

Compact Fluorescent Lamp

• Higher upfront cost
• Most energy efficient & produces less heat (lowering cooling costs)
• Long life span (5-10 years)
• Support full-cycle grows
• Good for large grows
• LEDs produce high cannabis yields
• Older / cheaper models can perform worse

• Lower upfront costs
• Reliable & trustworthy in the industry
• Produces high cannabis yields
• Support full-cycle grows
• Good for large grows
• Bulbs need to be replaced annually
• Less efficient
• Produce a lot of heat
• Higher electricity / cooling costs

• Lowest upfront cost
• Easy to set up (good for beginners)
• Uses little electricity
• Low heat output
• Adequate for very small grows or seedlings
• Low light output
• Shorter lifespan
• Not optimal for full-cycle grows

Desired Light Output (PPF)

Every plant varies in how much light output it needs to grow. For example, cannabis is an extremely light-hungry plant and requires a much higher light intensity than a vegetable such as a tomato. It is important to keep this in mind when choosing the best grow light for your set-up. As seen in the chart below, cannabis optimally should have a PPFD of 900-1000 µmol/m2/s or greater for the flowering stage, however the higher the better.

LIGHTOFGROWTH’s 1000w Dimmable Full Spectrum Grow Light 10 Bar-MAX at ฿22499 has some of the highest light output on the market with a maximum PPF of 2850 µmol/s and can achieve a PPFD high enough for flowering a 5’x5’ area of cannabis plants. 800w Dimmable Full Spectrum Grow Light 8 Bar at ฿12499 is a more compact light, but extremely capable with a PPF of 2180 µmol/s. This makes it ideal for smaller 4’x4’ cannabis grows. Both of our lights have integrated dimming controls, allowing them to be used for a variety of plants through all stages of the grow cycle. See the recommended PPFDs chart depending on the type of crop you are planning to grow to find the best grow light for you.



Low-Medium Light Plants


High Light Plants


Leafy Greens


Fruiting Vegetables


Fruiting Trees


Cannabis in Vegetative Stage


Cannabis in Flowering Stage


Light Spectrum

While getting the necessary light output is very important for your plants, the spectrum of light they receive is also important. Outdoor plants evolved to grow under natural sunlight, which produces every color on the spectrum. Therefore, the best grow lights have a full-spectrum grow light to best mimic natural sunlight and optimize plant growth.

Within the full spectrum, each wavelength (color) is responsible for a different effect on the plant’s growth. Blue and red light are the most prominent colors since blue drives stockiness in a plant during its vegetative stage. The red light helps plants stretch and bloom in the flowering stage. However, plants also utilize other colors. The green light is not as easily absorbed by the plant for photosynthesis, so that makes it more effective at penetrating the plant canopy and delivering light to areas that are less saturated with light. Therefore, it is optimal to use a full-spectrum light that uses a combination of all colors at all stages of growth. Both LIGHTOFGROWTH’s LED grow lights have full-spectrum white light, which you can see in the graph below.


It is important to not solely look at wattage when comparing light outputs of different grow light fixtures. Wattage only specifies how much power the light uses, but not how much light output it produces for the plants. Efficacy (Watts/PPF) is more important to consider, which is defined as a grow light’s ability to convert power into light that can be used by crops (PAR, which is measured as PPF). Efficacies vary depending on the type of light, which means fixtures with the exact same wattage could have very different light outputs. For example, since LEDs are much more efficient, LIGHTOFGROWTH’s 700W LED Light has a higher light output than a 1000W DE HPS Light. There is even variation among LED lights as some use more efficient diodes and drivers leading to greater light output, despite using the same amount of electricity.

When looking at grow lights, you want to look for ones with high efficacies, so you can get the highest light output for each watt of electricity you are paying the power company for. LIGHTOFGROWTH’s 1000W Grow Light 10 Bar and 800W Grow Light 8 Bar fixtures have a very high efficacy of 2.6, which is among the best in the industry.

Do we have the grow light you need?

After reading all the information above, I am sure you are clear about what you want in a grow light for your plant. Here, LIGHTOFGROWTH, offers you eight options for grow lights. I bet there is one kind that can meet your needs. Look at the comparison graph below to know better about our product and choose the right one for your plant.

Grow light







Spectrum Type

240W Grow Light—4 Bar




Full Spectrum

320W Grow Light—6 Bar




Full Spectrum

650W Grow Light—8 Bar




Full Spectrum

700W Grow Light—8 Bar




Full Spectrum

800W Grow Light—8 Bar




Full Spectrum

800W Grow Light—8 Bar—Max




Full Spectrum

1000W Grow Light—10 Bar




Full Spectrum

1000W Grow Light—10 Bar—Max




Full Spectrum

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