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Instead of revealing the exact brightness of these settings, Glocusent describes them as being bright enough for “general reading,” “brighter reading,” and “precise working.” The brighter the setting, the shorter the battery life, and when we tested this light at home, it took more than three days for the battery to die when using a single light in yellow, general reading mode. This dropped to seven hours when both lights were set to the cool white setting, or precise working mode. This battery is rechargeable but note that it will only charge with the cable that comes in the box. Our review model wouldn’t work with any other USB-C line. The majority of book lights run on rechargeable batteries. Each one’s battery life depends on a number of factors, from the battery’s size, to the brightness setting you choose and how long you read for. Smaller, basic lights will go from full to flat in a few hours, but more advanced lights can run for more than three days of continuous use. Yes, there are two buttons on each side to control the brightness of the light and there is another button to control the color of the light. The color of the light goes from soft light to white light. You can turn on the light on both arms, or just turn on the light on one arm, they can be controlled individually. Neutral (3100K – 4500K): The middle of the brightness spectrum offers a mix of warm and cool light, and is the most versatile temperature. Realistically, you’re not going to be reading for three days straight, so even lights with battery life on the lower end of the scale should only need charging once a week. If you’re not reading regularly, they’ll last a lot longer. The main thing to consider when buying a rechargeable book light is what cable you need, and whether it’s compatible with all cables of that type, or just the one it ships with.
READ NEXT: The best air purifiers to buy The best reading lights you can buy in 2023 1. Vekkia/Luminolite Rechargeable 7 LED Book Light: Best clip-on reading light Some reading lights take this into consideration and feature multiple settings for different temperature gradients and brightness intensities.
Warm (2700K – 3000K): Bulbs at the lower end of the scale emit a soft white light that often looks yellow. Warm light isn’t the brightest option but is a good choice when you’re in bed, as it’s the most easy on the eyes.
Color temperatures are measured in degrees of Kelvin (K) on a scale from 1,000 to 10,000. When it comes to book lights “there are two main ranges of temperatures,” explains Sunir Garg, MD, clinical spokesperson for the American Academy of Ophthalmology. “One temperature is around 2,700K. This is similar to what a traditional incandescent bulb emits and is considered ‘warm.' The other range is around 5,000K.This is a typical white light or ‘daylight.'" CRI is the acronym for color rendering index, and you can usually see it when browsing some lighting bulbs and fixtures. In general terms, CRI measures a light source's ability to show object colors "realistically" or "naturally" under an artificial white light source compared with sunlight. In other words, the higher the CRI, the more attractive and vibrant your lighting objects will be . Book Light for Kids: Children are commonly perceptive to strong lights when reading, especially using a book reading light due to some reading before sleep. Therefore, the light has to be soft, gentle, and eye-caring for kids. 15 lumens are preferable when choosing a book reading light for kids when reading before bed. Cool (4600K – 6500K): At the top end of the scale is cool white light, which increases alertness and productivity. That blue light you’ve heard about in your phone/laptop/TV screen also falls into this category. It’s advised not to use cool light in the evening or when you’re anticipating sleep, as it hinders melatonin production and confuses your body into thinking it’s still light outside.Lumen measures the total quantity of visible light emitted by a source per unit of time. Lumens are now a new way of knowing how bright a lamp or a book reading light is. The brightness level of a book light associates closely with the lumen. You might need different book lights in various reading environments depending on your needs. The light angle is only 90-degree, illuminates in a narrow beam. So it only lights up the area you positioned and it is dim enough to other passengers. Other than that, you can also adjust the brightness to the dimmest level.
The two arms feature LEDs that provide either 2,700K of warm white light, which is suitable for reading, or 7,000K of cold white light, which is great for more precise working. There are then three brightness levels: spotlight, floodlight, and spot/floodlight combined. Its rechargeable battery lasts up to 16 hours on the spotlight setting, and you can charge it via standard USB.Up next is yet another clip-on book light that brings a couple more features to the mix. We are, of course, talking about the Glocusent USB Book Light, which can be snagged in five attractive colors.
Do you work in a dingy space? You should snag an excellent work light to illuminate your workplace.Construction: From metal to plastic, book lights are made of many different materials. Consider durability and whether each book light will work with the type of books that you read.
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