Can flourescent bulbs be used as grow lights
James Bradley
Updated on March 30, 2026
If you have older tubes, and they are getting a bit dark near the ends of the bulbs, this is a sign they should be replaced. So to answer your question, yes, standard cool-white fluorescent bulbs will work just fine for starting seeds and growing plants.
Can fluorescent bulbs be used as grow lights?
The short answer is: any type of fluorescent light will help any type of plant grow, whether it is cannabis or lettuce or orchids. … While you can use any type of tube or bulb and see results, you want to provide the kind of light your plants want most.
Can any light bulb be used as a grow light?
But, can regular light bulbs provide the same effect? Yes, bulbs that you have in your house can be used to grow plants. However, regular incandescent bulbs do not provide the range of color spectrum light that plants thrive on. A better choice for indoor growing would be LED lights designed for that purpose.
What is the difference between a grow light and a fluorescent light?
Heat Output Of LED vs Fluorescent Grow Lights LED grow lighting puts off next to no heat, whereas fluorescent grow lamps run cool, yet growers do need to consider the heat put out by fluorescent lighting to some degree, particularly with high output T5 fluorescent lighting.Can herbs grow under fluorescent light?
Kitchen gardeners have long grown herbs on window sills, under kitchen fluorescent bulbs and next to indoor orchid lights (see How to grow herbs indoors during winter). … Standard fluorescent lamps could help plants over winter and even produce some harvests depending on how close and intense the lights were.
Are T8 bulbs good for growing?
Tip. Four T8 fluorescent light bulbs will work well for growing vegetables indoors as long as you leave them on long enough to give the plants enough light.
What light bulb is closest to natural sunlight?
Halogen bulbs are a type of incandescent that gives a close approximation of natural daylight, known as “white light.” Colors appear sharper under halogen light and the bulbs can be dimmed. They’re a little more energy efficient than incandescent bulbs, but they’re more expensive and burn at a higher temperature.
Does artificial light help plants?
Sunlight is the perfect balance of wavelengths necessary for plant growth and blooming, but you can also use artificial light to help your plants along. In fact, low-light foliage plants (such as pothos and peace lily) can grow quite nicely in windowless offices with enough artificial light.Will regular LED bulbs grow plants?
Can a regular light bulb help plants grow? Yes, as long as it delivers enough PAR light to your plants. LED lights are great because they’re energy-efficient, emit little heat, and last for years. However, it’s probably best to get a horticultural light for plants with high light requirements.
What kind of light should I use for an indoor herb garden?Generally, herbs require at least six hours of sunlight per day. If where you’re growing your herbs doesn’t have access to natural light, you can substitute that with artificial lights. Use LED or HID lights for best results. Your plants would need 14-16 hours of light.
Article first time published onWhat lights to use for growing vegetables?
Fluorescent lights put off minimal heat and a good amount of light, but are not as efficient or long-lasting as LEDs. High-Intensity Discharge (HID) lights are ideal for growing maturing edible plants. However, HIDs are expensive, use electricity inefficiently, and give off quite a bit of heat.
What color light is best for herbs?
While herbs require a full color spectrum for photosynthesis, blue and red light are most critical. Blue light regulates plant growth, while red light stimulates flowering and vegetative growth.
Is there a light that mimics sunlight?
Ketra LEDs dynamically shift throughout the day, providing the full range of sunlight—crisp and bright during the day, soft and warm at night. … Ketra introduces lighting technology that perfectly mimics sunlight, offering wellness and quality-of-life benefits to indoor occupants.
What are natural bulbs?
Very simply put, a lighting source that closely replicates natural sunlight can be considered a natural light source. … A lamp with a color temperature of 6,500 kelvin and a CRI of 82-84 is simply not a natural lighting source.
Can you use fluorescent lights to grow vegetables?
Fluorescent lights are ideal for plants with low to medium light requirements, like African violets. They are also good for starting vegetables indoors. … In addition to this, fluorescent bulbs use 75 percent less energy than incandescent lights.
What's the difference between a T8 and a T5 light?
The major physical difference between T5 and T8 light bulbs is the length and diameter of the tube itself. The T5 tends to be slightly shorter than the T8 tube, and is significantly smaller in diameter. This factor is important to consider when looking at your fixture, because the two tubes are not interchangeable.
What is the difference between a T5 and T8 grow light?
The main difference between the T5 and T8 Grow Lights is the diameter of the fluorescent tubes. T5s are 5/8″ in diameter, while T8s are 1″ in diameter. Also, T5s are slightly shorter than T8 fluorescent tubes. This is an important note as it means it could be difficult to swap out T5s and T8s on the same fixture.
What makes a grow light different?
Grow lights have a shorter lifespan than regular LEDs. The intensity of grow lights makes them more likely to burn out at a faster rate than regular light bulbs. … That way, you will be able to create the right environment that promotes growth by choosing the right lights that help your plants flourish.
What color light helps plants grow best?
- Violet-blue light in the 400 – 520 nanometer range encourages chlorophyll absorption, photosynthesis, and growth.
- Red light in the 610 – 720 spectrum range promotes flowering and budding.
Can you use daylight bulbs for plants?
Daylight bulbs promote vegetative growth so they are a good choice when growing house plants. Place the bulbs about 2 inches above the plants but no further than 12 inches. For best results, replace the bulbs about every 8 months.
Can you grow herbs inside without direct sunlight?
A lack of adequate sunlight will dramatically reduce the flavor of your herbs. … Ideally, you want to place herbs in a window that will receive at least six hours of sunlight a day. If that’s not possible in your space, consider adding a grow light or placing the herbs next to a fluorescent bulb to boost light exposure.
Does Rosemary like grow lights?
The best LED grow lights for herbs will give your plants the right amount of light they need to grow and flourish. Many of the popular culinary herbs like basil, oregano, rosemary, and thyme need six to eight hours of full sun. … Simply put, grow lights are the key to healthy, happy herbs.
How do you grow basil under a grow light?
Whether being grown indoors or outdoors, basil plants need ample light—at least 6 hours of full sun daily. If you’re using fluorescent bulbs, keep your basil under them for 12 hours a day, with the lights about 2 to 4 inches away from the top of the plants.
Do vegetable plants need darkness?
Plants do need that period of darkness for their metabolism to work properly. They are not designed to create food non-stop, and it will do them harm in the long term to put them in this sort of situation. So, yes, plants need their darkness just as much as they need their light.
Can you leave grow lights on 24 hours a day for vegetables?
A: In general, you should not leave grow lights on 24/7. Plants need a light-dark cycle to develop properly. It’s believed that they truly do “rest” during periods of darkness, and probably use this time to move nutrients into their extremities while taking a break from growing.
Can you grow vegetables indoors without lights?
You can easily grow radishes, lettuce, spinach, and other cool-weather crops in this environment. Northern-facing: This window gets the least lighting. If you hope to grow plants in this window, you will likely need artificial lighting. … This is very good, and you can grow most vegetables (and other plants) in this sun.
Can you grow mint indoors over winter?
Cold-hardy herbs, such as chives, mint, oregano, parsley, sage and thyme, can often survive cold-winter temperatures while continuing to produce flavorful foliage, as long as they are provided with some protection or grown indoors.
Can you grow herbs indoors under lights?
Under grow lights: Full-spectrum growlights are ideal for all herbs. Place plants within a foot of the bulbs or follow the instructions provided with your lights. Start by having the lights on for 12 to 16 hours a day for bright-light plants and adjust as necessary.
What herbs can grow without sunlight?
- Lovage. Botanical Name: Levisticum officinale. …
- Chives. Botanical Name: Allium schoenoprasum. …
- Sweet Cicely. Botanical Name: Myrrhis odorata. …
- Corsican Mint. Botanical Name: Mentha requienii. …
- Parsley. Botanical Name: Petroselinum crispum. …
- Wasabi. …
- Tarragon. …
- Angelica.
Do grow lights give you vitamin D?
Summary: Light from RayVio’s 293nm ultraviolet (UV) LED is more efficient than sunlight at producing vitamin D3 in skin samples, research shows.
Are fluorescent bulbs full spectrum?
Full spectrum lighting generally falls within two larger lighting types: Incandescent and fluorescent.