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 . 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.

Neutral (3100K – 4500K): The middle of the brightness spectrum offers a mix of warm and cool light, and is the most versatile temperature.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. Clip-On Light: The clip-on book light requires more lumens.Because they generally have bigger sizes and heavier weights. Hence, consumers usually use clip-on book lights as fixed bed reading lamps or a reading light clipping on the bed headboard. For a well-designed clip-on book light, reaching more than 150 lumens is a common practice to light up the entire bedroom, not only for book reading.

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. 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. The best book lights offer multiple color and brightness settings. This is so you can customize your lighting to suit your eyesight preferences. Lumen and watt measure different things for sure. Watts refers to how much energy the light bulb uses, while lumen indicates the light bulb's brightness or the light output of a light bulb. Watts do not tell you how bright the bulb is, but lumens do.

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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.'" Color temperature refers to a system using numerical values to measure the color characteristics of a light source on a spectrum ranging from warm to cool colors. The numerical values can be indicated as degrees Kelvin, noted by the symbol K. In layman's saying, color temperature signifies a way of describing a light source's warmth or coolness color features. The lower the color temperature, the yellower the light; the higher the color temperature, the whiter the light. The light head can be swiveled and rotated by up to 270 degrees, so you can point it at your sweater or your book whilst knitting or reading. Additionally, you can prop the LALAKU LED light on a flat surface and use it as a makeshift table lamp, too. The options that follow cater to a range of lights that offer a short throw, thereby ensuring you don’t disturb your partner’s beauty sleep. At the same time, these lights can aid you in your book-reading and knitting pursuits.

The best reading lights you can buy in 2023

Amber Book Light: As for the amber light, 20 lumens are commonly preferred. The soft and gentle amber light will stimulate your body to produce more melatonin naturally. It is widely used for reading in bed before sleep with the special amber mode. 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. This bedside book light plugs mimics the soft, warm light emitted from candlelight. It has three brightness settings—25, 50, and 100 percent—so you can make it as bright as you need for reading. It also has a flexible arm that lets you direct the beam of light at the best possible angle, which increases how much of a book you can see at one time. The lamp is rechargeable using the included USB cord, and it can last for up to 16 hours. While choosing the right book light, you would need to consider certain factors including brightness levels, the comfort of usage, portability, charging options, battery power, style, and cost. 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.

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. 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. 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. Do you work in a dingy space? You should snag an excellent work light to illuminate your workplace.Reading light is generally referred to as a book reading light. Specifically, it’s an electric light that sheds light on your reading material; for people who want to read at night, do some reading in a darker environment, or even do some knitting, a suitable book light may come in handy.