Lighting Technology & Trend

Explanation
To get a cooler incandescent lamp with a color temperature of 5300 K or 6500 K, filters can be used on an MR16 lamp. Filters can be added to the lamp to adjust the color temperature and achieve the desired cooler temperature.

Explanation
12 hrs cycles lamps are recommendable to use in all the mentioned options above, including retails, warehouses, offices, and schools. These lamps are designed to provide light for a specific duration of 12 hours, making them suitable for environments that require consistent and reliable lighting throughout the day. Whether it is for commercial spaces like retails and warehouses or educational institutions like offices and schools, these lamps can effectively meet the lighting needs and ensure a well-lit environment for the intended purposes.

Explanation
The correct answer is Lumen 10,000 lm / Efficacy 77 lm/W. This means that the T5 VHO 120 W system produces a lumen output of 10,000 lumens and has an efficacy of 77 lumens per watt. The lumen range refers to the total amount of light output, while efficacy measures how efficiently the system converts electrical power into light.

Explanation
The T8 32 W Extra Long Life has a rated average life of 40,000 hrs / 46,000 hrs, making it a long-lasting option. It is also low in mercury and energy efficient, which makes it environmentally friendly and cost-effective. Therefore, all of the given options are features of the T8 32 W Extra Long Life.

Explanation
Standard metal halide became commercially available in 1964.

Explanation
The Pulse Start Metal Halide lamp provides 20% more lifetime compared to the Standard Metal Halide lamp.

Explanation
The correct answer suggests that the NEC 2005 indicates the use of open-rated lamps. Open-rated lamps are designed to be used in fixtures that do not have a protective cover, allowing for proper ventilation and preventing overheating. The NEC 2005 may have specific regulations or guidelines regarding the type of lamps that should be used in certain fixtures to ensure safety and compliance with electrical codes.

Explanation
The CRI (Color Rendering Index) for Philips metal Halide Par Lamp at 4000K is 92-93. CRI is a measure of how accurately a light source can render colors compared to a reference light source. A higher CRI indicates better color rendering capabilities, and a range of 92-93 suggests that this lamp provides excellent color rendering.

Explanation
The efficacy for the Cree's white Xlamp 7090 power LED package is 47 lm/W. Efficacy refers to the efficiency of a light source in converting electrical energy into visible light. In this case, the LED package is able to produce 47 lumens of visible light per watt of electrical power consumed.

Explanation
The efficacy for Philips OLED package is 30 lm/W. This means that for every watt of power consumed, the OLED package produces 30 lumens of light output. A higher efficacy value indicates that the package is more efficient in converting electrical energy into light, resulting in brighter and more energy-saving lighting solutions.