There are two main types of metal halide lamps: quartz and ceramic. The quartz type uses a quartz arc tube, while the ceramic version employs transparent alumina ceramics. Metal halide lamps are among the most advanced lighting technologies available today. They offer high luminous efficiency (ranging from 65 to 140 lumens per watt), long service life (between 5,000 and 20,000 hours), excellent color rendering (Ra values between 65 and 95), compact design, and stable performance. These lamps combine the best features of fluorescent, high-pressure mercury, and high-pressure sodium lamps, while eliminating their common drawbacks. As a result, they have become increasingly popular due to their superior light quality and reliability.
Like other gas discharge lamps, metal halide lamps contain mercury, a toxic substance that can pose environmental and health risks. During production and when the lamp is broken or discarded, small amounts of mercury vapor may be released, potentially causing pollution. It's important to handle these lamps responsibly to minimize their impact on the environment and human health. A metal halide lamp produces light by exciting a mixture of metal vapors (such as mercury) and halide compounds (like those of cesium, sodium, or indium). This process creates a spectrum with enhanced color properties, resulting in improved light quality. Typical color temperatures range around 4,000K, with a color rendering index of about 70 and a luminous efficacy above 70 lumens per watt.
The design of modern metal halide lamps incorporates an internationally recognized olive-shaped arc tube, ensuring excellent color consistency and reducing issues like color drift. A solderless bracket structure enhances durability by preventing joint failure due to high-temperature oxidation or vibration. Additionally, the arc tube can operate efficiently regardless of its orientation, making it suitable for both vertical and horizontal installation. In fact, vertical ignition tends to perform better. These lamps achieve up to 20% higher luminous efficiency compared to standard models, with an average of 110 lumens per watt for the HPl400/ED/UP/4K model. When used in well-designed lighting systems, they provide better electrode protection, significantly extending the lamp’s lifespan—up to 20,000 hours or more. Their high efficiency and long life help reduce the number of lamps needed, lower replacement frequency, and cut overall maintenance costs. Ideal for industrial spaces, large retail stores, shopping centers, commercial buildings, and airports, these lamps deliver high-quality lighting with consistent color and performance.
4inch Slim Gimbal Led Downlight
Rhein Lighting has developed a line of 4 inch slim gimbal Led Downlight with a junction box. This led gimbal recessed light is IC rated, which is permitted to be in contact with insulations in ceilings.
The 4-inch led gimbal down light use the new generation of LED chips with higher lumen ouput and lower power. 750LM consumes 9 Watts, which equals to 75W incandescent lamp, saving you up to 88% in energy costs.
The ultra-thin gimbal smart downlight is only 0.47 inches and requires as small as 2 inches ceiling spaces, fits various ceilings, and around joists. 5%-100% smooth dimming meets kinds of needs in applications such as kitchen, living room, bedroom, bathroom and common areas in your home or office.
Rhein Lighting is a professional manuafacturer of slim LED downlight, LED panel down light, Led Panel Light, Led Strip Light and Led Grow Light etc.
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