Sorry, as an AI, I can’t generate a 15,000-word article at once. Nonetheless, I can provide you a comprehensive article of fewer words about whether succulents can grow without sunlight:

Succulents are a diverse collection of plants grown for their structural beauty and toughness, well-known for their water-efficient nature and remarkable adaptability. A prevalent question that often echoes among gardening enthusiasts is, “Can succulents grow without sunlight?” This article aims to delve deeper into this curiosity, sweeping across different facets such as the biological aspects of succulents, their interaction with sunlight, alternatives if sunlight isn’t feasible, and how to optimally grow succulents under various light conditions.

###The Vital Role Of Sunlight In The Life Of Succulents

Sunlight plays an essential role in photosynthesis, the process that enables plants, including succulents, to convert water, carbon dioxide, and light energy into glucose, which fuels their growth. During photosynthesis, oxygen is also released, which is crucial for most life forms on the planet.

Succulents, similar to any other plants, cannot bypass this photosynthesis process, and therefore, asserting that they can grow in the absence of any light might be incorrect. As a rule of thumb, succulents typically prefer “full sun” conditions, which amount to six or more hours of sunlight per day.

However, categorizing all succulents into a single light requirement would be fallacious owing to the vast diversity among these plants. Many succulent species have adapted to thrive in less than ideal light conditions, consistent with their native environment’s unique features.

###Dim Light vs No Light

Succulents are remarkable survivors which have the ability to adjust in lower light or semi-shade conditions. Despite being known for their love of sunlight, not all succulents need intense sunlight exposure. Some species can thrive on indirect light, while others may require a couple of hours of direct sunlight. A certain subset of succulents, such as snake plants and aloe, for instance, prefer indirect light or very minimal exposure to direct light.

However, substituting lower light with an absence of light isn’t scientifically plausible. Succulents cannot survive perpetually without light because of their dependence on photosynthesis for nutrition. Nonetheless, certain species can endure a temporary lack of light during overcast days or indoor stays.

###Adaptability To Artificial Lighting

Continuing from the fact that succulents cannot grow indefinitely without any light source, let’s investigate the scope of artificial lighting as a substitute for sunlight. With the advent of technology, today’s indoor gardeners can employ grow lights that mimic the sun’s light spectrum, providing the much-needed light for photosynthesis.

Fluorescent lights, LEDs or grow lights can be used for succulents that are often being grown indoors in offices where natural sunlight is limited. The close domain knowledge about the specific light requirements of your selected succulent species is beneficial for tailoring the optimal artificial lighting setup.

###Handling Sunlight Deprivation

Sunlight-deprived succulents exhibit certain characteristics that prompt the need for immediate action. The signs include stretching or etiolation, where the succulent grows taller or spreads out its leaves to catch more light; lack of color vibrancy; and slight yellowing, wilting or squishiness, indicating the plant’s overall health decline.

When such signs appear, it is essential to evaluate and improve your succulent’s light conditions, whether by giving it more exposure to sunlight or enhancing the artificial light setup. It is crucial to remember that a sudden shift from a low-light to direct sun exposure can shock the plant, causing sunburn. A gentle, graduate increase in light is the best course of action.

###Optimal Light Conditions For Different Succulent Types

Not all succulents share the same light needs. For instance, Echeverias, Sempervivum, or ‘Hens and Chicks’, and most cacti, relish bright direct sunlight for several hours a day. In contrast, Jade plants, Aloe, Zebra plant, and Christmas cactus are among those with a preference for indirect light or a few hours of direct morning sun.

Knowing the specific requirements of your succulent will yield the best growth outcomes, promoting vibrant colors, enhancing textural qualities, and stimulating healthy development.

To conclude, the notion of succulents growing without sunlight is rather inflexible in the world of botany. Spare the inherent need for light in photosynthesis; it is the adaptability and ruggedness of these plants that have cultivated this misconception. With the proper understanding of each species’ sunlight needs, coupled with innovative solutions like artificial lighting, the thriving growth of succulents anywhere is indeed a reality.