A monitor light bar clips to the top of your screen and lights the desk in front of it, without the glare a desk lamp throws across the panel. On a 27-inch monitor the things that decide the choice are the clamp range, how wide the light spreads, and whether you can adjust it without reaching over the screen. These three cover the range from budget to premium.

Which One Should You Get?

Best for most 27-inch desks – Quntis Monitor Light Bar PRO+ – the one to start with if you want remote control and a clamp that fits almost any panel.
Best for a set-and-forget desk – BenQ ScreenBar – a no-fuss bar that dims itself and gets out of the way.
Best for late nights and color work – BenQ ScreenBar Halo 2 – the premium option, and the only one here with a backlight and a separate controller.

The three monitor light bars compared: Quntis PRO+, BenQ ScreenBar and BenQ ScreenBar Halo 2

Budget, simple and premium: the three picks at a glance

💡 Quntis Monitor Light Bar PRO+

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Quntis Monitor Light Bar PRO+

Pros

Widest clamp range of the three, from thin to thick bezels
Wireless remote with stepless brightness and color temperature
Ambient sensor for auto-dimming, plus a rest timer
Rated for curved panels, including ultrawides
CRI 95 color rendering, matching the premium bars on paper

Cons

No rear backlight
Plastic clamp base rather than an all-metal body
Brightness figures come from the manufacturer, with no independent measurement published

Unique Features & Insights

Independent comparisons place this as the default budget pick, mostly because it keeps the features that change daily use: a wireless dial instead of controls hidden behind the screen, an ambient sensor, and a clamp built for thicker and curved panels. On the numbers that matter for desk lighting, CRI 95 and a stated 1200 lux, it reads like the premium bars. What it gives up is the rear glow and the aluminium build.

💡 BenQ ScreenBar

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BenQ ScreenBar

Pros

Ambient sensor holds the desk near 500 lux on its own
Flicker-free and blue-light certified by BenQ
Runs from an ordinary 5V/1A USB port
The most written-about bar in the category, so quirks are well documented

Cons

Controls sit on the bar, so changing them means reaching over the monitor
Clamp is designed for flat panels with 1–3 cm bezels only
No rear backlight and no remote

Unique Features & Insights

The original ScreenBar is the simplest of the three and the one most buyers have written about. Hang it, and the ambient sensor keeps the desk lit without any setting to learn. The trade-off is control: the touch controls are on the bar itself, above the screen, and the clamp expects a fairly thin flat bezel, so it is the least flexible of the three about where it can go.

💡 BenQ ScreenBar Halo 2

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BenQ ScreenBar Halo 2

Pros

Tri-zone rear backlight, far wider than the previous generation
Rechargeable wireless controller, quoted at about three months per charge
Widest clamp range, covering curved panels from 1000R to 1800R
Highest light output and color fidelity of the three, at Rf>96
Ultrasonic sensor wakes the light when you sit down

Cons

By far the most expensive of the three
Needs USB-C at up to 3A, which a monitor port may not supply
One comparison reports the clip loosening over time on thick bezels

Unique Features & Insights

Reviews of the Halo 2 keep returning to two things: the rear glow, which BenQ widened substantially over the first Halo, and the separate wireless controller, which means settings change without anyone nudging the bar. Notebookcheck frames it as a lamp for people who work after dark, and How-To Geek describes the spread across the desk as even, with reflections kept under control. It also has the widest clamp range here, so it is the safest choice for an unusual monitor.

Final Comparison Table

Quntis Monitor Light Bar PRO+

0.12–2.36 in

1200 lux (stated)

3000–6500K

CRI 95

USB-C

Wireless remote dial

❌ No

BenQ ScreenBar

0.4–1.2 in

930 lux at 45 cm

2700–6500K

CRI Ra>95

USB-A, 5V/1A

Touch controls on the bar

❌ No

BenQ ScreenBar Halo 2

0.17–2.36 in

>1000 lux at 50 cm

2700–6500K

Rf>96

USB-C, 5V/3A

Wireless controller

✅ Tri-zone

Feature	Quntis Monitor Light Bar PRO+	BenQ ScreenBar	BenQ ScreenBar Halo 2
Fits bezel thickness	0.12–2.36 in	0.4–1.2 in	0.17–2.36 in
Center illuminance	1200 lux (stated)	930 lux at 45 cm	>1000 lux at 50 cm
Color temperature	3000–6500K	2700–6500K	2700–6500K
Color rendering	CRI 95	CRI Ra>95	Rf>96
Power input	USB-C	USB-A, 5V/1A	USB-C, 5V/3A
Controls	Wireless remote dial	Touch controls on the bar	Wireless controller
Rear backlight	❌ No	❌ No	✅ Tri-zone

Pick by how you work rather than by the spec sheet: the Quntis covers most desks for the least money, the BenQ ScreenBar is the set-and-forget option, and the Halo 2 is the one to get if you work after dark or care about color. Check current availability through the links above.

Frequently Asked Questions

Will a light bar fit a 27-inch monitor?

Yes. All three bars here are 45 to 51 cm wide, which is narrower than a 27-inch panel, and the clamp sits on top of the bezel. What matters more than screen size is bezel thickness: the BenQ ScreenBar takes 1 to 3 cm, while the Quntis PRO+ and the Halo 2 go down to about 0.3 cm and up to 6 cm.

Do monitor light bars work on curved monitors?

The Quntis PRO+ and the ScreenBar Halo 2 are both specified for curved panels, with the Halo 2 rated for a 1000R to 1800R curve. The original BenQ ScreenBar is aimed at flat monitors with thinner bezels.

Do they cause glare on the screen?

All three use an asymmetric optical design that aims the light down onto the desk rather than at the panel, which is the whole reason to choose a light bar over a desk lamp. Glare usually comes back when the bar is tilted too far forward, so the angle is worth setting once, carefully.

Can I power one from the monitor's USB port?

The original ScreenBar draws 5V/1A and is designed for a standard USB port. The Halo 2 asks for USB-C at up to 3A, and the Quntis PRO+ is also USB-C, so a monitor's low-power USB port may run the front light but not the backlight at full brightness. A wall adapter avoids the problem.

Is the rear backlight worth paying for?

It matters in a dark room: the glow behind the monitor reduces the contrast between a bright screen and a dark wall. In a room with normal lighting it adds little, which is why the two cheaper bars here skip it.

Will the bar block a webcam mounted on the monitor?

A bar and a clip-on webcam compete for the same strip of bezel. BenQ sells a webcam adaptor for the ScreenBar family, and the usual alternative is to move the camera to a small tripod beside the screen.

Best Monitor Light Bars for 27-Inch Monitors: Top 3 Compared

Which One Should You Get?