No, sunlight is not necessary for growing succulents, to put it briefly. Any visible light can be utilized by any plant for photosynthesis. They do, however, always receive something from the light, even though the quantity of “power” they receive can vary greatly depending on the characteristics of the light.
Are succulents benefited by UV light?
Modern technology has made a range of grow lights readily available on the market. Fluorescent and LED grow lights are the two most popular types for succulents grown indoors.
Fluorescent grow lights, to start.
Since many years ago, fluorescent lighting has been used. They are available in various sizes and shapes. T5, T8, and T12 are the three that growers choose. Due to its exceptional performance, the T5 fluorescent growth light is the best choice out of the three.
However, you can switch to CFL (Compact Fluorescent Light) varieties if you don’t have enough room for the long tube. It comes in several tiny bulbs that fit into a single base with a round, flat bottom. If you only have a few succulents on your desk at home or at work, this is another excellent grow light option.
Since they frequently offer “full spectrum” lights that range from red to ultraviolet light, fluorescent lights are a favorite among gardeners. These lights are frequently referred to as “daylight,” “cool,” or “white/blue.”
Keep in mind that CFL bulbs can produce a lot of light and heat. You should place them farther from your plant than a typical fluorescent tube when using them.
The lights are pleasing to the eye and give succulents enough light to thrive in the winter.
2. a grow light made of LEDs (LED)
 
The LED grow lamp is effective in that it gives your plants particular light wave lengths. How does it perform on your cacti? Actually, succulents only care about blue and red light, exactly like many other plants. LED lighting is designed to provide succulents a very limited range of light, or really just one color. As a result, they use less energy than CFL bulbs while producing higher energy savings.
Does this imply that LED is superior to fluorescent lighting and more cost-effective? Yes, it is less expensive, but that does not automatically equate to better. When you give them a certain kind of light, they frequently behave differently. For instance, when exposed to specific red or blue light, your succulent can be urged to bloom rather than grow.  
The main disadvantage of LED lighting is that due to its low intensity, it is unable to give the UV light that succulents require in order to have a “sun-stress hue.” Consequently, your succulents will essentially only be green during the winter.
Additionally, compared to the “white light” produced by fluorescent lighting, the color of LED light may be uncomfortable to look at.
3. Metal halide and high-intensity discharge
The majority of home gardeners do not use this kind of grow light. Large-scale, commercial growth operations use it. Of course, it is the most expensive and capable of producing the strongest light and heat.
How much lighting do succulents require?
The majority of succulents favor direct, strong light. Even in less than perfect indoor lighting conditions, certain succulents can still grow. The succulent species that can thrive in low illumination conditions are listed below.
The huge genus of miniature succulents known as Haworthias is indigenous to South Africa. Some haworthia species have a look that is very similar to aloe vera and can be mistaken for it. Depending on the species, these plants produce rosettes of various sizes and shapes.
Some are solitary, while others form clusters. Most have substantial roots. Some species have softer, plumper leaves with translucent, glassy surfaces that let sunlight to pass through for photosynthesis, while others have thick, stiff, fleshy leaves that are often dark green in color.
Although most haworthia species can grow in low light, bright, warm settings are preferred for their appearance. Be extremely careful not to overwater the plant when it is cultivated in low light. Under low light circumstances, overwatering the plant might be harmful.
Rainforests in South America, the Caribbean, and Central America are home to the cacti genus Rhipsalis. Rhipsalis species do not flourish in direct sunlight and extremely dry soil, contrary to popular belief that cactus require strong sunlight and dry circumstances. Usually, these plants are grown indoors.
They thrive in the morning light and afternoon full shade. The surrounding, heavily overhanging tree branches provide the rhipsalis with plenty of shade in its natural habitat. In comparison to most cactus, they are also more adaptable to increased humidity. Rhipsalis requires routine watering because it is not drought-resistant.
Overwatering should be avoided, though, as it can lead to root rot. The Rhipsalis Baccifera, sometimes known as the mistletoe cactus, is one of the most well-known rhipsalis species. These plants thrive indoors and need shade or partial shade.
The bloom that this genus produces, which has the appearance of a stomach, gave rise to its name.
The Latin word for stomach is gastro. They are indigenous to South Africa and require a lot of rain and light shade to grow.
These are now able to tolerate low light levels and have developed good indoor growing habits. Additionally, they thrive in warm, direct light. They have curving, stomach-shaped blooms and long, thick, grooved leaves. They prefer sandy soils with good drainage.
Schlumbergera is a member of a tiny cacti genus. They are native to the Brazilian tropical rainforests and require some humidity. They cannot stand extreme heat or cold. The look and behaviour of Schlumbergera species are distinctive from those of other cacti.
They grow on trees in moist, humid environments as epiphytes or as lithophytes on rocky terrain. Schlumbergera stems develop joints that might be flat, shaped like leaves, or shaped like bottles. All seasons see green growth on the stems.
The Christmas Cactus or Thanksgiving Cactus is one of the most popular types and has gained popularity as a houseplant due to its stunning, spectacular blossoms. This tropical cactus does not thrive in afternoon or full sun.
Do cacti require a heat lamp?
To be precise, you can grow succulents without a grow light this winter. Your windows may let in enough light to keep your succulent plants compact and healthy. or you might be cultivating a species that does well under dim lighting. But what if your succulents are echeveria, aeonium, or one of the numerous sun-loving types and you don’t have good lighting? Do succulents really require a grow light?
No. This winter, you do not necessarily must utilize a grow light. Without enough light, your succulents will grow too large. But the essential objective is to ensure that the plants survive, so long as the stretching does not become excessive. Your succulents’ tops can be removed in the spring so they can grow into shorter plants, and you can pick leaves to replant.
Priority one is to ensure that your succulents survive the winter by bringing them inside where they will be protected from the elements. Your plants will be bigger in the spring if you utilize a grow light than they were in the fall. They’ll live even if you don’t use a grow light. Cutting them down and re-rooting your plants will result in some size and time loss, but you will still have your succulents. To make sure your succulents are in the best possible shape come spring, use a grow light.
Can succulents be grown under a standard lamp?
I don’t have much experience growing succulents in cold temperatures and dark winters because I live in sunny Southern California. I’m fortunate enough to be able to leave my plants outside all year long without significant frost or low light harm. I am aware that many of you reside all over the world and are unsure of what to do with your plants now that you have brought them indoors for the winter. Perhaps despite the fact that you have your plants on window sills, they are still growing languidly, or perhaps the winters in your area are completely dark. Look nowhere else! I’m very happy to have indoor plant growing specialist Ben Thorton here with us today to share his knowledge about using grow lights to support the growth of your lovely garden regardless of the lighting situation!
Succulents have recently risen to the top of the list of preferred indoor plants because of how attractive they are, how they enhance the atmosphere of your home, and how little maintenance and water they need compared to other indoor plants. Many people are reluctant to grow succulents in regions with short summers because they are warm-weather and sun-loving plants. You might be shocked to learn that even if you live in a climate with distinct seasons and chilly, gloomy winter months, you can still grow succulents all year round. Once the weather becomes cooler, just move the succulents inside and provide the artificial lighting they require. Here is a simple tutorial on growing succulents indoors and under artificial lights if you are unsure about using grow lights or worried that you might harm your plants by using them.
Artificial lighting can be categorized as either lighting used in addition to natural lighting or lighting utilized to perfectly mimic sunlight in situations where none actually exists. Since vitamin D, one of the most important vitamins in the human body, is obtained from sunlight, artificial light cannot replace it for humans. In contrast to other living things, plants just require the light itself from the sun. Photosynthesis is a process that takes place when plants are exposed to light and provides them with the energy they require to grow. Succulents can be grown indoors under artificial light just as well as outdoors in natural sunshine, provided that the right amount of light is provided. To successfully grow your succulents in your house, you will need to select the best lights and understand a few basic lighting techniques.
There are a few considerations to keep in mind when selecting artificial lighting for an indoor garden. And they are as follows:
How strong and bright is the light produced by the grow lights?
The brightness of the light produced by grow lights is the most important factor to consider because it will affect how much light the plants receive and how well they can grow. You need lights for succulents that produce at least 2,000 lumens per square foot of illumination. 10,000 lumens per square foot are produced by noontime direct sunlight, but if you run 2,000 or more lumen lamps for 14 or more hours a day, the plants will receive almost the same amount of light as they would in the height of summer.
What is the light’s wattage?
Another item to consider is the wattage of the grow lights you buy, as this will have an impact on your electricity bill. You pay more for electricity the more watts a light uses, therefore you don’t want to choose a light that is brilliant but uses a lot of watts because that will be very expensive. To get the best of both worlds—bright light for your plants and minimal electricity consumption for you—look for lights that are marked as energy efficient. These lights will likely have a high lumen count and low wattage, giving you the best of both worlds.
What color temperature range does the light produced by grow lights fall into?
Because succulents love the sun and prefer bright light to shadow, they also need a particular light with regard to the color temperature of the light. The visible color that the grow lights emit is essentially their color temperature. Kelvins are used to measure this. To provide the light that plants require to thrive, light must fall within a certain range of color temperatures. Starting at roughly 5,000 Kelvins, the ideal color temperature for succulents will provide your succulents cool, full-spectrum light that closely resembles sunlight.
How much heat is emitted by the light?
Finally, it is crucial to understand how much heat the grow lights emit. If they produce a lot of heat, you can experience a problem with the temperature in the space where you grow your succulents, which would require you to invest extra money in a reliable ventilation or cooling system. Additionally, if lights produce a lot of heat, you will need to situate your plants farther away from the lights in order to prevent them from burning them. Your plants may not receive enough light as a result. Some typical grow lights are known to emit a lot of heat, while others remain cool to the touch even after being on for 24 hours. Make sure a grow light doesn’t produce too much heat before you buy one.
I would advise you to purchase T5 grow lights since they have all the qualities of a good grow light and I have experience working with many various types of grow lights. Their diameter is 5 eights of an inch. T5 grow lights are available in a variety of configurations, including two different lengths (2 ft and 4 ft bulbs), numerous different bulb counts (from 1 to 12 bulbs in one fixture), various efficiency types (Normal Output (NO), High Output (HO), and Very High Output (VHO), and various color temperature varieties (from only 2,900 Kelvins up to 10,000 Kelvins). I typically use high output (HO) bulbs because a 2 foot HO T5 bulb uses just 24 watts and produces 2,000 lumens, compared to a 4 foot long high output (HO) T5 bulb that uses 54 watts and produces 5,000 lumens. You obtain incredibly effective light that is ideal for succulents if you mix one or the other length bulbs in a group of two or more bulbs and choose bulbs that are in the color temperature of 6,500 Kelvins.
Although choosing the correct artificial light is an important aspect of effectively growing your plants in an indoor garden, there are a few other factors you should be aware of in order to do even better.
Be aware of the height at which you should hang your plant canopy’ grow lights.
Knowing how high to hang your grow lights is essential since it affects how much light the plants receive. You must hang grow lights so that they may provide the maximum amount of light to the plants without overheating them by radiating heat, regardless of whether you select T5 fixtures or select other grow lights. In order to reduce the risk of your grow lights burning and harming your plants, I would first advise placing any grow light at least 6 to 8 inches away from the tops of your succulents. You can later move your lighting fixtures closer to the succulents if you discover that they don’t emit heat and are cold to the touch (like T5 grow lights).
Determine the light cycle
Because there won’t be a sun to determine when plants receive light, you must determine the plants’ light cycle while growing plants indoors under grow lights. Knowing your light cycles will help you grow your succulents more quickly. Indoor gardens use light cycles to replicate day and night circumstances. Succulents will also develop more quickly if you give them more light, which is a common rule of thumb for growing any plants under lights. If you’re overwintering the plants, I’d recommend starting with a 20/4 light cycle for the succulents. This means leaving the lights on for 20 hours a day, turning them off for 4 hours, and then gradually extending the darkness time until the light cycle is 16/8 (light/dark). Succulents require knowledge of the winter solstice so they can begin their dormant period. If you use grow lights all year for your succulents, you may set the light cycle to 24/0 or 20/4 in the summer to help them develop swiftly and flourish.
Learn how frequently to water your succulents.
Finally, it should be noted that watering is equally crucial because both inadequate and excessive watering might harm your plants. Even if you’re using grow lights to simulate summer, you still need to water the succulents during the summer by watering them once the soil is dry. Even if succulents are cultivated indoors, things change over the winter. Succulents use substantially less water while they are dormant throughout the winter or an imitation of winter since they are either growing very slowly or not at all. So, how frequently should you water succulents in the winter? In general, I’d advise watering them every two weeks, but if the room is hot, you’ll need to water them more frequently because the heat will cause them to dry out more quickly. Looking at the soil in which succulents are growing will tell you how frequently they need watering during the winter. Allow the soil to dry up completely before giving succulents approximately a week to absorb the water before you water them again to prevent overwatering.
January 2017 addition: