It’s very important to have a desk or table lamp focusing light onto your book, but it’s also important to compliment this with evenly distributed lighting throughout the room. Many people make the mistake of turning on a bright lamp in a dark room when reading. However, this is incorrect as your pupils dilate due to the surrounding darkness when they wander off the page, which can make your eyes easily tired – one of the main reasons why many of us become quickly fatigued when reading in bed at night. You should also avoid reading by light that reflects a bright glare, such as a computer screen.
Brightness is measured in lumens, the following will help you choose a bulb with the correct wattage needed.
LED: 4 watts: Look for at least 450 lumens
LED: 6 watts: Look for at least 500 lumens
LED: 7.5 watts: Look for at least 630 lumens
LED: 10 watts: Look for at least 800 lumens
Be sure to keep in mind that too much light or glare can be just as bad as having too little light. If light glares from reflective surfaces, it can be fatiguing on the eyes and disturb older people who have cataracts and retina problems. If a bright light is giving you trouble, simply use a shaded light source rather than a desk lamp in order to decrease glare and evenly distribute light. By investing in a warmer colour temperature this will be easier on your eyes rather than in a cooler colour. When considering the right light for your eyes, remember that your eyes will tell you what they need. If a light isn’t comfortable, your will eyes will show signs of fatigue – this can include burning, redness, brow-ache, headaches and squinting.