lights for microgreens

Best Lights For Growing Microgreens: Definitive Guide For Optimal Growth


Finding the best lights for growing microgreens can feel like searching for a needle in a haystack. With so many options available, it’s easy to get lost in the details. But don’t worry—I’ve got you covered! Whether you’re a seasoned gardener or just starting your green-thumb journey, understanding the nuances of microgreens lighting is crucial for a healthy, vibrant crop.

Microgreens, those tiny yet nutrient-packed powerhouses, thrive on the right kind of light. Just like a chef needs the perfect ingredients for a dish, your microgreens need the perfect light to grow robustly. From the warm glow of the sun to the high-tech brilliance of LED panels, each lighting option brings its own set of benefits and challenges. In this guide, we’ll dive deep into the different types of lights, how to set them up, and everything in between. So, grab your gardening gloves and let’s shed some light on the best ways to grow your microgreens!


What are the Best Lights for Microgreens?

lighting for Microgreens

The Best lights for growing microgreens are those that provide a full spectrum of light, mimicking natural sunlight to promote optimal growth. Among the top choices are LED grow lights, which are highly efficient and versatile. These lights emit a balanced mix of blue and red wavelengths, crucial for photosynthesis and healthy development of microgreens.

LED lights are energy-efficient, generate minimal heat, and have a long lifespan, making them a cost-effective option in the long run.

Fluorescent lights, particularly T5 and T8 bulbs, are also popular due to their affordability and adequate light spectrum coverage. They are easy to set up and provide consistent light, although they consume more energy compared to LEDs. For those relying on natural light, placing microgreens on a sunny windowsill can work, but supplementing with artificial lights ensures consistent and robust growth, especially during shorter daylight periods. Ultimately, the best lights for growing microgreens are those that offer the right intensity, spectrum, and efficiency to keep your greens thriving all year round.


Sunlight and Natural Light for Growing Microgreens

Ah, sunlight—the original grow light. If you’re blessed with a sunny windowsill or a well-lit balcony, you might think Mother Nature has you covered. And she does, to an extent. Sunlight provides the full spectrum of light that microgreens adore. It’s like giving them a gourmet meal every day.

However, unless you live in a place with perfect weather year-round (looking at you, Southern California), relying solely on natural light can be a bit tricky. Overcast days and short winter daylight hours can leave your microgreens craving more. So, while sunlight is fantastic, it might need a little help from our artificial friends during certain times of the year.


Fluorescent Shop Lights

Fluorescent shop lights are the old workhorse of indoor gardening. These lights are like the reliable old truck in your grandpa’s garage—not flashy, but they get the job done. They’re relatively inexpensive and easy to find, which makes them a great starting point for beginner microgreen growers.

Fluorescent lights, especially T5 fixtures, provide a good amount of the light spectrum that microgreens need. They’re cool to the touch, which means you can place them close to your plants without worrying about a scorched harvest. But they’re not the most energy-efficient option out there, and they do have a limited lifespan. Still, for the budget-conscious or those just dipping their toes into the world of microgreens, these lights can be a solid choice.


LED Bulb Shop Lights

Now, let’s talk about LED bulb shop lights. Think of these as the new kid on the block who’s super smart and incredibly efficient. LED technology has come a long way, and these lights are a testament to that progress. They use less energy than fluorescents, which means lower electricity bills and a greener footprint.

LED bulbs can be found in various spectrums, allowing you to tailor the light to your microgreens’ specific needs. They also last significantly longer than fluorescent bulbs, which means less frequent replacements and more savings in the long run. Plus, they don’t emit much heat, so you can keep them close to your plants without the risk of wilting. If you’re looking to upgrade your lighting setup, LED bulbs are definitely worth considering.


LED Strip Grow Lights (T5)

T5 grow lights

LED strip grow lights, particularly the T5 variety, are like the Swiss Army knife of microgreen lighting. They’re versatile, efficient, and can be customized to fit almost any growing space. These strips can be mounted under shelves, inside grow boxes, or even around corners to ensure your microgreens get consistent light coverage.

One of the biggest advantages of LED strip grow lights is their flexibility. You can adjust the placement and angle to maximize light exposure, ensuring every little sprout gets its fair share. They also come in a range of light spectrums, so you can experiment to find the perfect blend for your greens. Whether you’re growing in a tiny apartment or a spacious greenhouse, these lights can adapt to your needs.


LED Panel Lights for Growing Microgreens

LED panel lights are like the high-tech gadgets of the lighting world. They’re sleek, powerful, and packed with features that can take your microgreen growing game to the next level. These panels provide a broad, even light distribution, which is perfect for larger setups or commercial operations.

Many LED panels come with adjustable settings for different light spectrums and intensities, giving you complete control over your growing environment. They’re also incredibly energy-efficient, meaning you can keep your greens basking in light without feeling the pinch in your pocket. If you’re serious about microgreens and want to invest in a top-of-the-line lighting system, LED panels are the way to go.


Microgreen Grow Lights Setup

microgreens grow light

Setting up your microgreen grow lights is a bit like arranging furniture in a new apartment—you want everything just right. The first step is to choose your light source based on your needs and budget. Once you’ve got your lights, it’s time to set them up.

For most microgreens, you’ll want your lights to be about 12-18 inches above the trays. This distance ensures they get plenty of light without getting scorched. Use a timer to mimic natural daylight cycles—generally, 12-16 hours of light per day is ideal for most microgreens. Remember to adjust the height of the lights as your microgreens grow, keeping them at the right distance to ensure healthy, robust growth.


How Far Should My Lights Be from Microgreens?

Finding the sweet spot for light placement is crucial. Too close, and you risk burning your delicate greens. Too far, and they’ll stretch out, becoming leggy and weak. The Goldilocks zone for most microgreen lights is 12-18 inches above the trays.

Keep an eye on your plants and adjust as needed. If you notice your microgreens leaning or stretching towards the light, it might be too far away. If the leaves start to curl or develop brown edges, the lights are likely too close. Regular adjustments will help you find that perfect distance where your microgreens can thrive.


How Many Hours of Light Do Microgreens Need?

Microgreens, like all of us, thrive on a good routine. They typically need about 12-16 hours of light per day to grow healthy and strong. A timer can be a lifesaver here, ensuring your greens get the right amount of light without you having to remember to switch things on and off.

During the early stages, you might want to keep the lights on for the full 16 hours to encourage robust growth. As they near harvest, reducing the light to 12 hours can help them develop rich colors and flavors. Experiment and see what works best for your particular setup and the varieties you’re growing.


What Do Light Spectrums Have to Do with Growing Microgreens?

Light spectrums are to plants what a good diet is to humans—they need a balanced mix to thrive. Different colors of light affect plant growth in various ways. Blue light encourages leafy growth, making it essential during the early stages of microgreens. Red light, on the other hand, promotes flowering and fruiting, which isn’t as crucial for microgreens but can still play a role in overall plant health.

Full-spectrum lights are a great choice because they provide a balanced mix of all the wavelengths plants need. Think of it as giving your microgreens a well-rounded meal. However, if you want to fine-tune your setup, you can use specific spectrums to target different growth phases. Just like how a chef uses different spices to enhance a dish, you can use different light spectrums to optimize your microgreens’ growth.

Is Window Light Enough for Microgreens?

Picture this: it’s a beautiful sunny day, and you’ve placed your microgreens on a windowsill, expecting them to soak up the rays and flourish. Sounds perfect, right? Well, not always. While window light can provide some of the light microgreens need, it often falls short in intensity and duration, especially in less sunny climates or during the winter months.

The issue with window light is its inconsistency. Your microgreens might get great light on one side but remain in the shadows on the other. Plus, the light’s angle changes throughout the day, leading to uneven growth. If you notice your microgreens leaning towards the window, it’s a sign they’re craving more light.

In some cases, supplementing with artificial lights can bridge the gap. Combining window light with LED or fluorescent grow lights can give your microgreens the consistent, full-spectrum light they need to thrive. So, while window light can contribute, it’s usually not enough on its own for optimal growth.


Can Any LED Light Be Used as a Grow Light?

Ah, LEDs—those magical, energy-efficient wonders. You might be tempted to grab any old LED bulb and start growing microgreens, but not all LEDs are created equal. Regular household LEDs don’t provide the full spectrum of light that plants need. They’re designed for human eyes, not plant growth.

Grow LEDs, on the other hand, are tailored specifically for plants. They offer a mix of red, blue, and sometimes even far-red and ultraviolet light, mimicking the sun’s natural spectrum. This combination promotes photosynthesis, helping your microgreens grow strong and healthy. Using regular LEDs might result in leggy, weak plants that don’t reach their full potential.

So, while you might save a few bucks upfront with regular LEDs, investing in proper grow lights will pay off in the long run with lush, vibrant microgreens.

How Many Lights per Shelf for Microgreens?

Fluorescent grow light

Determining the number of lights per shelf is like figuring out how many cookies to bake for a party—too few and someone’s left out, too many and it’s overkill. The number of lights you need depends on the size of your growing area and the type of light you’re using.

For fluorescent and LED strip lights, a general rule of thumb is one light per shelf if it’s around 2-4 feet long. For larger shelves or those with more trays, you might need two lights to ensure even coverage. LED panel lights usually cover a larger area, so one panel might suffice for a full shelf.

Always aim for uniform light distribution. Overlapping the lights a bit can help avoid dark spots and ensure all your microgreens get the light they need. Monitor your setup and adjust as necessary—your microgreens will quickly let you know if they’re not getting enough light.


Is It Better to Grow Microgreens Indoors or Outdoors?

Choosing between indoor and outdoor growing is like choosing between city and country living—both have their perks and challenges. Indoors, you have control over the environment, from light and temperature to humidity. This control can lead to more consistent and predictable growth.

Outdoor growing, on the other hand, exposes your microgreens to natural sunlight and fresh air, which can enhance flavor and growth rates. However, outdoor conditions can be unpredictable. Weather changes, pests, and varying light conditions can make it more challenging to maintain a steady growth cycle.

For most hobbyists and small-scale growers, indoors is the way to go. It offers more control and less risk. However, if you’re in a favorable climate and can manage the variables, outdoor growing can yield fantastic results. It’s all about weighing your priorities and resources.


How Many Watts Do Microgreens Need?

When it comes to watts, think of it as the power behind your lights. The wattage you need depends on the type of light you’re using and the size of your growing area. For fluorescent lights, aim for around 20-40 watts per square foot. LEDs are more efficient, so 10-20 watts per square foot is usually sufficient.

However, wattage isn’t the only factor to consider. The light’s spectrum and intensity are equally important. High wattage doesn’t necessarily mean better if the light isn’t optimized for plant growth. Balancing wattage with other factors ensures your microgreens get the best possible light environment.


What’s a T8 Fluorescent?

T8 fluorescents are like the classic rock of grow lights—tried and true, reliable, and still popular despite newer technologies. T8 refers to the bulb’s diameter, which is 1 inch (or 8 eighths of an inch, hence the name). These lights are a staple in many indoor gardening setups because they’re affordable, easy to find, and provide a decent spectrum for plant growth.

Compared to T5s, which are thinner and more efficient, T8s are bulkier but still effective. They offer a good balance between cost and performance, making them a solid choice for beginners or those growing on a budget. While they’re not as energy-efficient as LEDs, they’re a dependable option for growing microgreens.


When Should I Expose Microgreens to Light?

Timing is everything, right? For microgreens, you’ll want to expose them to light as soon as they start to sprout. This usually happens a few days after sowing. When you see those tiny shoots peeking through the soil, it’s time to flip the switch.

Early exposure to light helps promote healthy growth and prevents the seedlings from becoming leggy as they stretch toward a light source. Keep the lights on for 12-16 hours a day to mimic natural daylight and encourage robust growth. Using a timer can help maintain a consistent light schedule, ensuring your microgreens get just the right amount of light each day.


How Do You Know Your Microgreens Are Getting Enough Light?

Microgreens are great communicators—they’ll let you know if they’re happy or not. If your microgreens are getting enough light, they’ll grow strong and upright with vibrant colors. On the other hand, if they’re not getting enough light, they’ll start to show signs of stress.

Look for seedlings that are stretching towards the light or becoming leggy and weak. This is a clear sign they need more light. Yellowing leaves can also indicate inadequate light, although this can also be a sign of other issues like nutrient deficiencies.

Regularly check your microgreens and adjust the light distance and duration as needed. If you’re using LED or fluorescent lights, make sure they’re positioned correctly and provide even coverage. Your microgreens should look happy, healthy, and ready to harvest in about 7-14 days.


What is the Best Color Temperature for Microgreens?

A chart showing a wide scale of varying color temperature ranges measured in kelvins with their corresponding everyday colors for reference

Source:commercial led lights


Color temperature might sound like a technical detail, but it’s crucial for plant growth. Measured in Kelvin (K), color temperature affects the type of light your microgreens receive. For optimal growth, aim for a color temperature between 5000K and 6500K. This range mimics natural daylight, providing a balanced spectrum of blue and red light that supports photosynthesis and healthy growth.

Cool white lights (5000K-6500K) are ideal because they provide a good mix of blue light, which promotes leafy growth, and red light, which helps with overall plant health. Avoid warm white lights (2700K-3000K) as they tend to have more red light, which isn’t as beneficial for the vegetative growth stage of microgreens.


What Light Intensity Do You Need for Microgreens?

Light intensity, measured in lumens or foot candles, is another critical factor. For microgreens, you’ll want a light intensity of around 2000-4000 lumens per square foot. This intensity ensures your microgreens get enough light energy to photosynthesize and grow efficiently.

Too little light intensity can result in slow growth and weak plants, while too much can cause stress and potential light burn. Adjusting the distance between the lights and the plants can help manage intensity. Start with the recommended distance (12-18 inches for most setups) and adjust based on how your microgreens respond.


Can a Grow Light Be Too Strong?

Yes, a grow light can indeed be too strong. Think of it like getting too much sun at the beach—you end up with a sunburn instead of a tan. If your grow lights are too intense, they can cause light burn, where the leaves turn yellow or brown, and the plants become stressed.

To avoid this:

  1. Start with the recommended light distance and intensity for your specific light type.
  2. Monitor your microgreens closely.
  3. If you notice signs of light stress, such as leaf curling or discoloration, increase the distance between the lights and the plants.

Adjusting the light cycle can also help—reducing the hours of light per day can prevent overstressing your microgreens.



In the journey of growing microgreens, understanding the role of light is paramount. From the type of light to the intensity and duration, each factor plays a crucial role in determining the health and vitality of your microgreens. Whether you’re using natural sunlight, fluorescent shop lights, or advanced LED systems, tailoring your setup to meet the specific needs of your microgreens will ensure a bountiful harvest. By paying close attention to their growth patterns and adjusting your lighting setup accordingly, you can enjoy fresh, vibrant microgreens all year round. Happy growing!