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2.2 LED Lighting:
- Light Emitting Diodes (LEDs) produce light by passing an electric current through a semiconductor material.
- Highly energy-efficient, durable, and long-lasting, making them an increasingly popular choice for residential and commercial lighting.

Replacing a rear main seal is a labor-intensive process that often requires removing the transmission or engine to access the seal. Due to the complexity of this repair, it is recommended to have it done by a qualified mechanic or automotive technician to ensure the job is done correctly.

Introduction
In the field of construction and engineering, struts play a crucial role in providing structural support to various types of buildings, bridges, and infrastructures. Struts are designed to provide stability, resistance to compression forces, and overall structural reinforcement. This article aims to explore the significance of struts, their various types, applications, and the materials used in their construction.

What are Struts?
Struts are structural components that are commonly used in construction to provide support and reinforcement to different types of structures. They are usually slender, load-bearing members that work in compression to prevent buckling or deformation of the structure. Struts are typically installed diagonally or vertically to support beams, columns, walls, and trusses, thereby enhancing the overall stability and strength of the structure.

Conclusion
In conclusion, struts play a crucial role in the stability and structural integrity of buildings, bridges, and various engineering structures. By providing support, reinforcement, and resistance to compression forces, struts contribute to the overall safety and durability of constructions. Understanding the types of struts, their applications, and the materials used in their construction is essential for engineers, architects, and construction professionals involved in designing and building structures that stand the test of time.

3.2 Lighting Maintenance:
- Regularly inspect and clean lighting fixtures to ensure optimal performance and longevity.
- Replace burnt-out bulbs promptly to avoid overloading other components and prevent issues like flickering or dimming.

Within automatic transmissions, there are different variations such as traditional automatic transmissions, continuously variable transmissions (CVT), and dual-clutch transmissions (DCT). Each type has its own unique design and functionality, but they all work towards the same goal of efficiently transferring power from the engine to the wheels.

Conclusion:
Understanding electrical and lighting systems is essential for maintaining a safe and functional environment in our homes, workplaces, and public spaces. By familiarizing ourselves with the components of electrical systems and types of lighting available, we can make informed decisions when it comes to installation, maintenance, and upgrades. Remember to prioritize safety and consult with professionals for any electrical work to ensure a reliable and efficient system for years to come.

2.3 Fluorescent Lighting:
- Uses a tube containing mercury vapor to produce ultraviolet light that excites phosphors to create visible light.
- Commonly found in office buildings and retail spaces due to their energy efficiency and bright illumination.

There are two main types of transmissions used in vehicles: manual and automatic. In a manual transmission, the driver manually selects the gears by using a clutch pedal and gear shift. This type of transmission offers greater 1990 Acura Legend 2.7L Electronic Control Unit over the vehicle's performance but requires more skill and effort from the driver. On the other hand, automatic transmissions use a hydraulic torque converter to automatically shift gears, providing a more comfortable and convenient driving experience for many drivers.

One of the key environmental impacts of vehicle emissions is air pollution. When released into the atmosphere, pollutants from exhaust can react with other compounds to form smog and ground-level ozone. These pollutants can irritate the respiratory system, exacerbate asthma and other respiratory illnesses, and contribute to cardiovascular problems. Additionally, particulate matter (PM) can penetrate deep into the lungs and even enter the bloodstream, leading to serious health issues.

Heater hoses are designed to be flexible and durable to withstand the constant flow of hot coolant and pressure fluctuations within the cooling system. Over time, heater hoses may become worn out, cracked, or damaged due to exposure to heat and chemical elements in the coolant. It is important to inspect heater hoses regularly for signs of wear and tear, such as leaks, bulges, or soft spots, and replace them if necessary to prevent coolant leaks and system failure.

Functionally, heater hoses operate in conjunction with the engine's water pump to ensure a continuous flow of coolant through the system. As the engine generates heat during operation, coolant is circulated through the engine to absorb excess heat and prevent overheating. The hot coolant is then directed to the heater core, a small radiator-like component located inside the vehicle's cabin, where a fan blows air over the warm coolant to provide heat for the interior.