Construction string lights are generally categorized by bulb type and their intended use. LED string lights are popular for their energy efficiency and long lifespan, while incandescent string lights offer a warmer, traditional light. Other types include low voltage, heavy-duty, and tower lights, each designed for specific needs and environments. 

By bulb type:

• LED string lights:
  These lights have become a popular choice in the construction field due to their energy efficiency, durability, and ability to emit bright and stable light. They come in a variety of color temperatures and brightness levels.
  
• Incandescent string lights:
  These lights emit warm and inviting light and usually have a lower initial purchase cost, but they consume more energy and have a shorter lifespan.
  
• Fluorescent string lights:
  These lights provide bright illumination and are more energy-efficient than incandescent bulbs, but they may not be as durable in harsh conditions.

Design and Usage:

• Heavy-duty String Lights:
  These lights are specially designed for harsh environments and are ideal choices for outdoor use and demanding construction sites. They usually have a sturdy structure, shatter-resistant lenses, and waterproof sockets.
  
• Low-voltage String Lights:
  These devices operate at lower voltages, making them a safer option for humid or water-containing environments.
  
• Tower Lights:
  These are self-sufficient and portable lighting systems, equipped with adjustable masts and powerful floodlights, suitable for large-scale lighting.
  
• Smart String Lights:
  These products adopt a technology that allows remote control through smartphone applications.
  
• Solar String Lights:
  These are environmentally friendly options that use solar energy to power the lights.
  
• Standard Building String Lights:
  These are usually rope-shaped light strips with bulbs spaced evenly, suitable for general outdoor use.