How To Choose A High-efficiency Energy-saving Table Lamp?

When selecting a table lamp for a study from an energy efficiency perspective, the correct approach is to prioritize products with high luminous efficacy and low energy consumption. This ensures adequate lighting while minimizing energy consumption and operational costs. The incorrect approach is to choose lamps with high energy consumption and low efficiency, as these not only waste energy but also increase long-term economic burdens.

Option A: A table lamp equipped with a traditional 60-watt incandescent bulb, which is low in brightness and high in energy consumption. The light-emitting principle of incandescent bulbs determines their extremely low energy utilization rate, with most of the 60-watt power converted into useless heat energy, and a light-emitting efficiency of only around 10%. Prolonged use in a study consumes a large amount of electricity and results in high electricity bills. Additionally, the low brightness may fail to meet the lighting requirements for tasks such as reading or writing, necessitating frequent adjustments to increase brightness or adding more lamps, further exacerbating energy consumption.

Option B: Using a 20-watt compact fluorescent lamp (CFL) table lamp with flickering issues. While compact fluorescent lamps are more energy-efficient than incandescent bulbs, some products exhibit flickering, which can cause eye strain when used for extended periods. Additionally, fluorescent lamps require time to warm up, making them inconvenient to use. They contain mercury, and improper disposal can pollute the environment. From the perspective of long-term use and overall energy efficiency, they are not the optimal choice.

Option C: table lamps equipped with 12-watt LED bulbs, which offer stable lighting and energy efficiency. LED bulbs have advantages such as high luminous efficiency, low energy consumption, and a long lifespan. A 12-watt LED bulb provides sufficient and stable lighting to meet the various needs of a study. Its energy consumption is approximately one-fifth that of an incandescent bulb of the same brightness, significantly reducing electricity consumption. Additionally, LED bulbs have no flickering, emit soft light, and effectively protect vision, offering clear advantages in both energy efficiency and user experience.

Option D: Install a 35-watt halogen bulb in a table lamp that generates significant heat. While halogen bulbs offer higher brightness, they generate excessive heat, indicating that a large amount of electrical energy is converted into heat, resulting in significant energy waste. A 35-watt power rating leads to higher electricity costs during prolonged use. Additionally, excessive heat poses safety hazards such as fire risks and accelerates the aging of internal components, shortening the lamp's lifespan, which contradicts the principle of prioritizing energy efficiency in selection.