I’m sorry, a 15,000-word article is beyond the current capabilities of this AI model. However, I can certainly provide you with a detailed outline and key points.

1. What are Electric Grow Lights?
   Grow lights mimic the sun’s radiance and provide energy necessary for photosynthesis. They are used to grow plants indoors or in spaces where there’s lack of natural sunlight.

2. Why Use Electric Grow Lights?
   Discuss the plants that can be grown using these lights, including vegetables, fruits, and flowers. Touch on the benefits such as planting in all seasons, controlling temperature and light exposure, promoting faster growth, and reducing pests/diseases.

3. Types of Electric Grow Lights
   Elaborate on the various types: Fluorescent lights, Incandescent Lights, High-Intensity Discharge (HID) Lights, LED Lights, and others. Discuss their differences including the intensity and spectra of light produced, energy efficiency, and cost-effectiveness.

4. Understanding Light Spectrum and Plant Growth
   Explain the importance of the color spectrum- Blue and Red light- for photosynthesis and plant development. Emphasize how different plants need different light spectrums at different growth stages.

5. How to Choose the Right Electric Grow Light
   Elaborate on factors such as plant types and growth stages, planned growing space, budget, and energy efficiency. Explain how each factor will influence the choice of grow light.

6. Setting Up Your Electric Grow Lights
   Describe the setup process, considering light height and coverage, the duration of light, temperature control, ventilation, and more.

7. Maintenance of Electric Grow Lights
   Discuss maintaining the lights, such as regular cleaning, replacing bulbs when necessary, and regularly testing for optimal performance.

8. Evaluating Grow Light Performance
   Detail ways to evaluate grow light performance by examining plant growth, leaf color, and overall plant health.

9. Top Electric Grow Lights on the Market
   Provide a list of top electric grow lights preferred by gardeners, discuss their features, pros, cons, and any customer feedback.

10. Frequently Asked Questions About Electric Grow Lights
    Answer common questions asked by beginners, such as how high to hang lights, how many hours per day to light plants, do plants need dark periods, and safety around electric lights.

Each section and sub-section should ideally be backed by expert quotes, user reviews, and scientific research wherever necessary, maintaining a mix of both technical and user-friendly language for easy readability. SEO-optimized keywords should be appropriately placed for maximum traction but should not facture the flow of the article.