The quality of its light is nearly as pleasing as that of the Elgato Ring Light, but it doesn’t include any apps or a remote, so you need to adjust the settings using toggles on the back of the light. It doesn’t get as dim at its lowest brightness setting as our picks, either. And it’s more expensive than our top pick, so we really only recommend it if you want the simplest possible device with the highest quality light.

Depending on the particular kind of filter circuitry being used, the general equation for a bandpass filter can change. But in its simplest form, the transfer function H(s) of a second-order bandpass filter can be represented as:

This light gives off beautifully diffused light and comes with high-quality accessories. It works with both a mobile app and desktop software, so you can adjust the light easily.

Light from the Lume Cube Ring Light Pro is as diffused and lovely as that of our top pick, but it offers a few quality-of-life improvements—albeit at a significant jump in price. Specifically, we love that it can be used wirelessly, can charge your phone, and remembers your favorite settings (with the included remote).

A basic passive bandpass filter using a RLC circuit. A second-order bandpass filter with a 500 Hz bandwidth and a 1 kHz center frequency is designed (assuming quality factor=1).

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Several of our testers who frequently do self-tape auditions praised this feature, saying it would make it easier to film in better locations in their apartments without being tethered to a wall for power.

For testing, we mounted each ring light to our desk and used it as a primary source of light for video calls and as a desk light over the course of a few days. We took notes on how easy each light was to install, power on and off, and adjust. We also noted how intense each light felt after sitting in front of it for over 30 minutes.

It can save your favorite settings. The included remote has a program button that saves your current settings. It can store up to three setting configurations.

The Elgato Ring Light is an excellent choice for anyone who needs a reliable, high-quality lighting solution. While most ring lights we tested in this price range give off harsh light with unflattering highlights, the Elgato light delivers softly diffused light that’s flattering in nearly all setups.

It’s not as customizable as our other picks. Unlike the Elgato and Lume Cube ring lights we recommend, which allow for precise 1% brightness adjustments and 50 or 100 Kelvin color-temperature changes, respectively, the LR120 changes brightness and color temperature in broader 10% steps, making it less customizable overall. Most people won’t find this too limiting, but those who want to dial in exact color temperature or brightness will probably want to opt for our top or upgrade pick.

Wirecutter’s head of photography Michael Hession and photo editor Rozette Rago helped us determine the most important features to look for in a ring light:

You can control the light in a variety of ways. Besides the physical buttons on the light itself, the Elgato light can also be controlled remotely with the Elgato Control Center app for mobile (Android, iOS) or its desktop Control Center software (available for Mac and Windows). Both are simple to use, with nothing more than a power button and sliders to adjust the color and brightness.

After a new round of testing, we’ve made the Elgato Ring Light our top pick, the Lume Cube Ring Light Pro our upgrade pick, and the Godox LR120 our new budget pick.

This light gives off beautifully diffused light and comes with high-quality accessories. It works with both a mobile app and desktop software, so you can adjust the light easily.

The included accessories are high quality. The Elgato light is primarily aimed at people who plan to use the light at a desk, so the box includes a sturdy C-clamp and a telescopic arm. Compared with most of the other models we tested, whose included accessories feel more like a flimsy afterthought, the Elgato light’s hardware feels durable and well constructed.

The remote is built into the cable. The LR120’s controls are built into its power cable rather than an app or separate remote. A simple in-line remote, located midway along the cord, offers buttons to turn the light on and off, adjust brightness, and switch between color temperatures.

Good lighting is the key to looking sharp and professional on camera, whether you’re streaming, vlogging, or sitting through endless video calls. Without it, even high-quality cameras can make you appear dull and out of focus.

The Lume Cube Ring Light Pro produces lovely light, but where it really shines is with its built-in battery. It can wirelessly illuminate a scene for over an hour at full brightness, and it has two USB outlets to charge your phone or other small devices. With no need to hunt for an outlet or deal with tangly charging cables, the wireless Ring Light Pro is especially helpful to anyone who plans to use the ring light on location or needs to film self-tape auditions often.

At 17 inches in diameter, the Elgato’s light wraps further around the subject for better diffusion. It’s also large enough to allow for more distance between the unit and subject while still being properly exposed.

This smaller, lightweight ring light has a soft glow that’s easy on the eyes. Just don’t expect extras like a remote, apps, or being able to make granular adjustments. It’s ideal for casual video calls.

Its light is as excellent as our top pick’s. The Ring Light Pro uses the same rim-mounted LEDs as the Elgato Ring Light, so the light it produces is just as beautifully diffused. Compared with some of the cheaper ring lights we tested, it’s a huge step up in comfort and appearance.

You can use more than one together. If you want to use multiple Ring Light Pros—for example, during a photoshoot or for video production—you can do so thanks to the built-in channel system.

Investing in a handful of tools can improve the quality of your videoconferences, for both you and the other participants.

This is especially useful if you’re using the Ring Light Pro for filming a project and need to make sure the lighting is consistent, or if you routinely use the light in a couple of different environments. It makes it easy to save the settings for each environment and then easily switch between them.

An earlier version of this article was written by Melanie Pinola, a Wirecutter senior staff writer who died in October 2024.

In this article, we will be going through the definition of bandpass filters. We will talk about the topic’s filters, types of filters, working principles, construction, and applications of bandpass filters after looking at their various types. We will also discuss its advantages and disadvantages along with some FAQs.

A bandpass filter is a device that controls the flow of electrical signals. It allows signals within a specific frequency range to pass through, while blocking signals outside that range. This means it only allows signals with frequencies that fall within a certain spectrum while eliminating unwanted ones. Next we will be going through the different types of Band Pass Filter and go through its different types in brief.

We also tested all of our contenders with a panel of paid testers, including individuals with dexterity and vision impairments, as well as a wide range of ages and body types. We noted any challenges they faced controlling the lights, and how they felt about the quality of the light.

During testing, a few of the panelists said they appreciated the stepped settings because the feature made it easy to replicate brightness levels in the future—for example, “two clicks of brightness.”

Signal processing is incomplete without bandpass filters, which are special-purpose devices that pass only a particular range of signals while attenuating all others that lie outside this range. These filters can be passive or active with different designs and concepts respectively. In the case of passive bandpass filters, the combination of capacitors, inductors and resistors is used while operational amplifiers are included in active filters to enhance their performance.

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This light gives off beautifully diffused light and comes with high-quality accessories. It works with both a mobile app and desktop software, so you can adjust the light easily.

The Yesker 14-inch LED Ring Light was our previous recommendation, but in the latest round of testing we found that its light was harsher than that of its rim-mounted counterparts. The Yesker light’s diffusion panel is semi-transparent, and several of the paid testers said that being able to see the wavy pattern of the LED bulbs was distracting and made the light hard to look at.

In summary, bandpass filters are crucial components for many electronic systems as they attenuate certain frequency ranges and permit selective transmission of others. These filters come in a range of configurations, including passive and active versions, each with special advantages and disadvantages. Passive bandpass filters typically consist of resistors, capacitors, and inductors, whereas active filters incorporate amplifiers to process signals. Their working principle is based on resonance phenomena, in which certain frequencies are transmitted while others are suppressed.

Filters are used to change the frequency of signals. They are available in different varieties, each with a distinct function:

Its light is effectively diffused. As opposed to most ring lights, where the LEDs are mounted to the back panel and directly face the subject, the Elgato Ring Light’s LEDs are positioned along the inner perimeter of the ring and face inward. That means the light coming through the front panel is softer than what we saw from cheaper ring lights we tested.

This smaller, lightweight ring light has a soft glow that’s easy on the eyes. Just don’t expect extras like a remote, apps, or being able to make granular adjustments. It’s ideal for casual video calls.

Additionally, unlike our other picks (which use rim-mounted LEDs for softer illumination), the LR120’s LEDs face directly forward. While this light’s opaque diffusion panel does a good job of softening the light, preventing the bulbs from being harsh or distracting, the light is still more directional and concentrated than what you’d get from our rim-lit picks.

Though it lacks advanced features, such as wireless operation or fine-tuned adjustments, its gentle, even light makes it a great choice for casual video calls or simple setups.

Exact frequency choice, noise reduction and size miniaturization are some of the benefits of using bandpass filters, however, they also suffer from limitations such as narrow bandwidth and component tolerance susceptibility. For example, telecommunication systems, medical equipment and radar technology among other applications all require accurate frequency management to operate at optimum levels.

An RC circuit or an RL circuit can be used to create a first-order bandpass filter. The transfer function H(s) of a first-order bandpass filter can be expressed as:

The LED lights in the GVM Ring Light 14-inch and 18-inch face the subject, and the diffusion panel isn’t as opaque, so the quality of light is not as pleasant, with stronger unflattering highlights. The included accessories are made of cheap plastic and don’t seem like they’ll last. Plus, the 12-inch light would sometimes power off when we raised the brightness to max.

The Neewer 12-inch Ring Light (RH12B) was one of the least comfortable models in our tests. Nearly all of our panelists said it was too harsh on the eyes and mentioned that they found it difficult to look at for more than a few moments. It includes “effect” lighting modes that simulate fire or strobe lights, but none of our testers could see a practical use for them.

MacroRing lightfor Canon

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The remote turns off after a minute of inactivity, so you first need to turn on the remote (by pressing the power button) before turning on the ring light. Since most remotes are always-on, it took us some time to adjust to pressing the power button without seeing the light turn on immediately.

This ring light has a built-in battery that can run up to 70 minutes at full brightness. It can also charge your phone while you record.

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Passive bandpass filters are made up of a combination of resistors, inductors, and capacitors. Usually, they consist of a resistor connected in parallel with an inductor and series capacitor forming a resonant circuit. This configuration allows the filter to selectively pass signals inside its designated range while attenuating frequencies outside of it. Capacitor and inductor values in bandpass filters are precisely tuned to achieve a specific operating frequency. A resistor complements this by limiting the frequency range and suppressing undesirable resonances. Passive bandpass filters, characterized by their simple design and affordability, are commonly employed in various electronic applications.

You can change its brightness and color temperature in 1% increments via Elgato’s mobile app (Android, iOS) or its desktop software Control Center. That means you can make precise adjustments without having to move from your location.

In our tests, we were able to use it for more than four three-hour online Dungeons & Dragons games at relatively low power, turning it off in between uses, before it needed to be recharged.

There are several ways to implement a second-order bandpass filter, including using active filters and multiple RC stages. The transfer function H(s) of a second-order bandpass filter can be expressed as

Wirecutter is the product recommendation service from The New York Times. Our journalists combine independent research with (occasionally) over-the-top testing so you can make quick and confident buying decisions. Whether it’s finding great products or discovering helpful advice, we’ll help you get it right (the first time).

Brightness and color are adjustable in 1% increments, and the Ring Light Pro comes with a remote so you don’t have to get behind the camera to change your settings. With the remote, you can save up to three presets to switch between scenes or lighting conditions easily. The light is 17.5 inches in diameter, slightly larger than our top pick, but similar in overall light distribution.

NeewerRing Light

It can work wirelessly. Unlike our top pick, which needs to be connected to power to function, the Ring Light Pro has a built-in battery that can run up to 70 minutes at full charge.

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Just remember to turn the switch back on before using the remote—otherwise, the remote won’t be able to power the light on.

A ring light is exactly what its name suggests: a doughnut-shaped light typically made of rows of LEDs. The halo shape diffuses light over a wide area, reducing shadows and washing away blemishes for a more flattering appearance. The space in the middle of the light is a great place to mount a camera or phone, because you get an even distribution of light around the lens.

The Godox LR120 Ring Light is a compact, lightweight option that delivers a soft, flattering glow. At 12 inches in diameter, it’s smaller than our other picks, making it easy to move and store. The smaller size also means you can’t position yourself as far from this light as you can from our other picks, because it provides more narrow, concentrated coverage.

It is an example of a filter that completely attenuates or blocks signals outside of the passband while flawlessly passing signals inside the specified passband, or frequency range.

As bandpass filters have limited bandwidth and insertion loss, they are not ideal for selecting frequencies. Nonetheless, because precise frequency control is essential in biomedical devices, audio processing, and telecommunications, they are widely utilized in these fields. All things considered, bandpass filters are essential for modifying signals in a variety of industries and enabling effective signal processing and transmission.

If you want a ring light that’s similar to our top pick but prefer not to use an app: Consider the LumeCube Ring Light Mini. It’s 12 inches wide—5 inches smaller than our top pick—but comes with high-quality, sturdy accessories, including a C-clamp and tripod feet for tabletop use.

With more steps between the coolest and warmest color-temperature levels, you have more flexibility in suiting your skin and environment.

If you only plan to use a ring light once in a while, the Godox LR120 Ring Light is an extremely simple yet effective option. It’s smaller than our other picks, so the light is less diffused and has to be positioned closer to the subject you want to illuminate, but the front diffusion panel is opaque enough to hide the LED bulbs.

Nearly all of our testers found its glow comfortable enough for extended use—something that can’t be said for other cheap ring lights we tested.

After researching and testing more than a dozen ring lights, we recommend the Elgato Ring Light as the best option for nearly any setup because of its beautifully diffused light, easily adjustable settings, and premium accessories.

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Ring Lightwith Stand

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This light doesn’t have an app or a separate remote like our other picks, but you can still adjust and change its settings without getting up thanks to a controller built into the power cable. And though its light quality—in terms of color temperature and brightness—is not as customizable as our picks, it is significantly more affordable.

This ring light has a built-in battery that can run up to 70 minutes at full brightness. It can also charge your phone while you record.

A ring light is a simple, cost-effective option that anyone can set up and use. It makes the most sense when you need just a bit more emphasis on yourself in a space without a lot of natural light and you don’t have the space to invest in a bulkier softbox lighting setup.

The Lume Cube Cordless Ring Light can work without cables, like our upgrade pick, but it uses large batteries that need to be plugged into the back of the light. In our tests, the batteries were difficult to fully plug in and remove. Most of our test panelists failed to install the batteries properly. The front diffusion panel on the cordless Lume Cube is less opaque than our picks, and most of our testers said the light from it was uncomfortable.

The front panel is also made of glass instead of plastic, with an internal grid structure that further breaks up the beams of light created by the LEDs. The result is a soft, even glow around the ring that’s easy on the eyes, with gentle highlights and smooth transitions into shadowed areas.

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Ring Lightfor photography

The Neewer 18-inch LED Ring Light (RL-18) was more of a hassle to use than our picks. It has brightness knobs but no in-line controls or remote control. It comes with two plastic filters you have to attach to change the color temperature to 3,200 K or 5,600 K, and the red filter colors everything in a hideous orange light. This ring light also made everything look overexposed at all but the lowest brightness temperatures.

A Bode plot is a graphical depiction of a system's frequency response that includes bandpass filters, among other filters. Here are concise steps to construct a bode plot:

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A bandpass filter's cutoff frequency is the frequency at which signals outside of its designated passband start to be attenuated or blocked. Generally speaking, a bandpass filter has two cutoff frequencies:

The Elgato Ring Light provides bright, even illumination for your setup, whether you’re applying makeup, taking a Zoom call, painting miniatures, or tattooing someone. The light it cast was the most pleasant of all the lights we tested, and it was also a favorite among our paid testers. It comes with a range of useful accessories, and it’s paired with mobile and desktop apps that can help you adjust settings on the fly.

But these features are really only worth the added cost if you plan to use this ring light for professional purposes, like on photo or video production, or for frequent self-tape auditions.

This smaller, lightweight ring light has a soft glow that’s easy on the eyes. Just don’t expect extras like a remote, apps, or being able to make granular adjustments. It’s ideal for casual video calls.

A well-designed ring light provides soft, even illumination that enhances your presence and ensures you’re always seen in the best light.

Ring Lightfor Phone

Lighting plays an important role in the image quality of your videos and photos, second only to the quality of your camera. But you don’t have to invest in a complicated lighting rig to get better close-ups.

Its light isn’t as diffused as that of our other picks. The smaller 12-inch diameter of this light means it doesn’t provide the same coverage as our larger 17-inch picks. That won’t be a problem if you plan to use the ring light positioned 2 to 3 feet away from whatever you’re lighting. Any more than that, however, and you may find the light will start to become harsh or dim.

I’m an associate staff writer at Wirecutter covering work-from-home equipment. In addition to this guide, I’ve authored several guides about home-office and hobby gear, including webcams, vlogging gear, and craft cutters.

This ring light can charge your phone. Two 5-volt USB-A ports are on the back of the light’s control unit to charge your phone or other small electronic devices.

ProfessionalRing Light

Coaxial (brightfield) illumination is used to view these targets and produce a bright image. Generally, this type of lighting makes use of a half-mirror.

In general, ring lights with front diffusion panels that were too transparent—allowing the LED bulbs to be clearly visible—were uncomfortable to sit in front of for extended periods. On camera, these lights produced harsher highlights and rougher transitions to darker areas.

You can change the settings remotely. The Ring Light Pro comes with a remote that lets you power the unit on and off, change the brightness and color, and switch between channels.

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This ring light has a built-in battery that can run up to 70 minutes at full brightness. It can also charge your phone while you record.

The more visible the bulbs, the worse the shadows. In some cases, when the LEDs were fully exposed, subjects cast multiple shadows—the opposite of what you’d expect from a properly diffused light source. Nearly all paid testers with vision sensitivities found these lights difficult to look at, and some even described them as painful.

You can assign different ring lights to different channels via either the remote or the on-body controls, and then change the settings of one light without changing the rest.

The illumintator produces a wavelenth of non-visible light effectively illuminating your target while staying invisible to unsuspecting prey.

The LED panel on the back is really bright. If you turn the Ring Light Pro off via the remote, the screen on the back remains illuminated, which could be annoying if you keep it in your bedroom. Fortunately, this can be easily fixed by toggling the switch on the back to power down the unit.