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Study lamps are vital to learning. Finding the best lighting for study is important for everyone. For the sake of maximizing the use of time and energy, and for the very important goal of preserving eyesight, anyone reading for understanding needs not only adequate light, but light that ensures reading with ease. Only when eye strain(疲劳) is not interfering does the learning process move forward.
Desk lamps
You can purchase a large number of stylish desk lamps from lamp stores and online. The products range from precious ones to casual ones, from traditional ones to ultra-modern(超现代的)ones. They feature such desirable additions as dimmer switches and night lights. Some have battery backup in case of power failure and a choice of OttLite bulbs that duplicate natural sunlight.
LED desk lamps
MetaEfficient reviews the most recommended LED desk lamps. These lamps come in many different styles and brand names and are valued for their directed beam of light, lack of heat and exceptional energy efficiency and brilliance. LED study lamps are made in goose neck and swivel(转圈)styles, as well as the more modern Z-bar and the human-like- figure of the Moppel light.
Safest desk lamps
According to Knol, StudyLite is the safest of all desk lamp designs. Not only does it provide LED light, freeing people from UV and IR radiation, but it has been tested to be eye-friendly. It has all the advantages-low cost and long life-of any LED lamps, but it is also equipped with rechargeable battery. Its design and choice of colors make it desirable for more than its efficiency.
21. What is the feature of Desk lamps?
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A．They are bought easily online.
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B．Their prices vary.
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C．Their styles are various.
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D．They have satisfactory additions.
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22. What do LED lamps and Study Lite lamps have in common?
A．Low cost and long life. B. Excellent energy efficiency and brightness.
C．Rechargeable batteries. D．Their design and color choice
23. What is the main purpose of the text?
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A．To give us some tips on how to protect our eyes.
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B．To give us some information on the best study lamps.
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C．To introduce the method of choosing a proper lamp.
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D．To present the finding that light affects study.
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