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Light the Whole Desk. Not the Screen.

Cosari ArcBeam 95

A 31.5-inch aluminum LED bar on dual arms that rises above your monitor and spreads even, flicker-free 95-CRI light across.

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  • Lights a full 63-inch desk with zero monitor
  • Ra 95+ color, no PWM flicker at any
  • Weighted base and metal C-clamp both included
  • Front touch slider plus auto-dimming light sensor
Cosari ArcBeam 95
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Built Like Studio Gear. Priced Like a Desk Lamp.

Every part of the ArcBeam 95 solves a problem we found in cheaper lamps during testing.

31.5-Inch Ultra-Wide Bar

An 800mm LED bar spreads 1,200 lumens across a 160cm (63-inch) desk, from keyboard to notebook, without a hotspot on your monitor.

95 CRI, Zero Flicker

Ra 95+ diodes show colors as they look in daylight, and a constant-current DC driver means no PWM strobing on camera or on your eyes.

Base or Clamp, Your Choice

Drop it into the weighted base or tighten the padded metal C-clamp onto any desk up to 2.36 inches thick. No hex keys needed.

Touch Slider + Auto-Dimming

Swipe from 10% to 100% on the front of the bar. Turn on auto mode and the sensor adjusts output as the room light changes.

How the ArcBeam 95 Works

Rises Above Your Monitor

Rises Above Your Monitor

The dual arms lift the bar up to 28.3 inches, so light falls on the desk instead of the screen. Your monitors stay clear while your whole workspace stays evenly lit.

Adjust Without Standing Up

Adjust Without Standing Up

The touch slider and color controls sit on the front of the bar. Pick from five color temperatures between 2700K and 6500K, or let the ambient sensor handle brightness for you.

Holds Its Position

Holds Its Position

Constant-torque zinc-alloy hinges are tested to 20,000 cycles and showed zero sag in our tests. Mount it on the weighted base or the padded clamp.

Cosari ArcBeam 95 hero
Excellent4.8 (247)Trustpilot

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Cosari ArcBeam 95

Ultra-Wide 95-CRI Flicker-Free Architect Desk Lamp with Weighted Base + Metal C-Clamp

Backed by our 30-Day Money-Back Trial & Full 2-Year Cosari Warranty.

$39.99 $79.99 Free Tracked Shipping Included

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30-Day Money-Back Guarantee plus a full 2-Year Warranty.

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Description

Light quality: The ArcBeam 95 uses Ra 95+ LEDs powered by a constant-current DC driver, so there's no PWM flicker at any dimming level. Output reaches 1,200 lumens, adjustable from 10% to 100%, across five color temperatures: 2700K, 3500K, 4500K, 5500K and 6500K.

Build and mounting: The housing is extruded, anodized aluminum that doubles as a heat sink and stays below 39°C after 10 hours at full power. Dual arms with constant-torque hinges reach 720mm. Mount it on the included weighted base or the metal C-clamp, which fits desks up to 60mm thick.

Who it's for: Remote workers, engineers, designers, students and hobbyists who spend long hours at a full-size desk (36 inches or wider). It runs on the included AC adapter and is not a battery lamp.

Shipping & 30-Day Returns

Free Shipping: Every order ships free with full tracking within 24 hours.

30-Day Trial: Try it at home for 30 days risk-free. Need help? Email us anytime at support@buycosari.com.

2-Year Warranty: If anything goes wrong within 2 years, we replace it free of charge or refund your order in full.

Why Choose the Cosari ArcBeam 95?

Cosari ArcBeam 95 Detail

No Glare, Less Strain

Light comes from above and in front of the monitor, so it lands on the desk instead of reflecting off the screen into your eyes.

Hinges That Stay Put

Constant-torque joints tested to 20,000 cycles hold any angle you set. No slow droop into your monitor after a few weeks.

Five Color Temperatures

Warm 2700K for late-night work, cool 6500K for detail tasks, and three steps in between. It remembers your choice after power-off.

Cosari ArcBeam 95 vs. Ordinary Alternatives

Cosari ArcBeam 95Standard Competitors

FeatureCosari ArcBeam 95Standard Competitors
Desk coverage160cm (63-inch) even spreadSmall bright circle, dark corners
Color renderingRa 95+Around Ra 80
FlickerNone (DC driver)PWM banding when dimmed
MountingWeighted base + metal clamp includedOne option, or clamp sold separately
ControlsFront touch slider + auto-dimmingButtons on top of the head
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What's Included

In the Box
  • 1 × Cosari ArcBeam 95 Dual-Arm 31.5-Inch Aluminum LED Lamp
  • 1 × Heavy Weighted Desktop Base
  • 1 × Metal C-Clamp with EVA Protective Pads
  • 1 × UL-Listed AC Power Adapter with 71-Inch (1.8m) Cord
Technical Specifications
  • Color Rendering: Ra ≥ 95
  • Light Bar Width: 800mm (31.5 inches)
  • Desk Coverage: 160cm (63 inches)
  • Peak Output: 1,200 lumens, 12W
  • Color Temperatures: 2700K, 3500K, 4500K, 5500K, 6500K
  • Dimming: 10%–100% stepless touch slider, 0 Hz PWM flicker
  • Max Arm Reach: 720mm (28.3 inches); Clamp Opening: 60mm (2.36 inches)
  • LED Lifespan: 50,000 hours; Power Cord: 1.8m (71 inches)
Care & Safety
  • Wipe the aluminum housing and diffuser with a dry microfiber cloth. Avoid sprays or solvents on the touch slider.
  • If you move the lamp between mounts, unplug it first and hand-tighten the thumb-screw or clamp bolt until snug. Don't overtighten.
  • Backed by our 30-Day Money-Back Guarantee & 2-Year Warranty
  • Customer Support: support@buycosari.com
In the Box Cosari ArcBeam 95

Set Up in Under 2 Minutes

Swipe left for steps 2 and 3

  1. Mount It
    1

    Mount It

    Tighten the padded C-clamp onto your desk edge by hand, or drop the stem into the weighted base and turn the thumb-screw.

  2. Position and Plug In
    2

    Position and Plug In

    Raise the arms so the bar sits a few inches above your monitor, then connect the power cord at the rear.

  3. Slide to Your Light
    3

    Slide to Your Light

    Swipe the front touch slider to set brightness, tap for color temperature, and get back to work.

Verified Customer Reviews

What 200+ Verified Buyers Say About the Cosari ArcBeam 95

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4.8
Based on 247 verified reviews
5 Stars
212
4 Stars
25
3 Stars
7
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1
97% of buyers recommend the Cosari ArcBeam 95
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✓ Verified Purchase
Marcus V. — Seattle, WA1 week ago

Zero glare on dual 27-inch monitors and my 4 PM headaches are gone

I work 10 hours a day in front of two 27-inch monitors and my old desk lamp just threw a giant white glare spot right across my spreadsheets. The 31.5-inch bar on the Cosari ArcBeam 95 clears the top of both screens easily and angles the beam forward onto my desk mat. Paper doesn't look hospital-blue anymore thanks to the 95-CRI LEDs, and my late-afternoon eye strain completely stopped.

Verified Purchase · Austin, TX · Cosari ArcBeam 95

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Elena R. — Austin, TX1 week ago

Includes BOTH the heavy desk base and the metal C-clamp!

Why do big brands charge $229 for a desk lamp and then have the nerve to charge another $39 just for the desk clamp?! Having both the heavy weighted base and the solid metal C-clamp included in the box saved me because my walnut desk has a beveled back edge. The anodized gunmetal aluminum feels like machined studio gear, not flimsy plastic.

Verified Purchase · Austin, TX · Cosari ArcBeam 95

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David K. — Chicago, IL1 week ago

Passed the iPhone slow-mo test at 10% brightness with zero flicker

I'm super sensitive to cheap LED PWM dimming. First thing I did was test the ArcBeam 95 with my iPhone slow-mo camera at 10% brightness and there is zero flicker banding across the frame. Bonus: my webcam video on morning calls looks 10x cleaner and more natural now.

Verified Purchase · Austin, TX · Cosari ArcBeam 95

✓ Verified Purchase
Hannah T. — Denver, CO1 week ago

Lower-arm touch slider is way better than reaching above your monitor

My biggest pet peeve with tall architect clamp lamps is when they put the buttons on top of the light bar so you have to stand up and yank the arm just to dim it. Cosari put the touch slider right on the lower arm at eye level. You just swipe your finger to go from a 10% late-night warm glow to 100% daylight without clicking through 10 button presses.

Verified Purchase · Austin, TX · Cosari ArcBeam 95

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Brian M. — Raleigh, NC1 week ago

Clears my curved ultrawide AND doesn't crush my webcam

Clip-on monitor light bars crushed my webcam mount and didn't fit the thick back of my 34-inch curved ultrawide. This dual-arm lamp clamps cleanly to the back corner of my standing desk, rises right over the top of my webcam, and lights up the entire 60-inch surface from my mechanical keyboard all the way to my legal pad on the right.

Verified Purchase · Austin, TX · Cosari ArcBeam 95

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Sophia L. — Boston, MA1 week ago

Auto-dimming sensor is the sleeper feature here

My home office gets strong afternoon sun that fades fast around 4:30 PM. With the auto-dimming mode turned on, as the sun goes down outside my window, the ArcBeam 95 quietly brightens itself so I never end up squinting in the dark. The joints hold their exact angle with zero droop.

Verified Purchase · Austin, TX · Cosari ArcBeam 95

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Greg P. — Portland, OR1 week ago

Massive light spread—just make sure you have a real desk

This is a serious workstation light, not a tiny clip-on book light. The 31.5-inch head is wide and throws a huge, even pool of light. The AC adapter brick is a little chunky under the desk power strip, which is why I knocked half a star in my head, but the light quality and aluminum build at $39.99 are unbeatable.

Verified Purchase · Austin, TX · Cosari ArcBeam 95

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Claire W. — Minneapolis, MN1 week ago

True 95-CRI color accuracy for architectural redlines and swatches

I review printed floor plans and interior fabric swatches at my desk. Cheap 80-CRI LED lamps always washed out warm grays and made reds look muddy. At 4500K neutral white on the ArcBeam 95, paper looks crisp and true to daylight without any harsh blue spike.

Verified Purchase · Austin, TX · Cosari ArcBeam 95

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Jason D. — Phoenix, AZ1 week ago

Runs barely warm even after a 12-hour shift

My old halogen-style architect lamp used to radiate heat right onto my forehead. The extruded aluminum body on the Cosari stays barely warm to the touch even after a 12-hour workday. The friction hinges are tight right out of the box and don't sag an inch when I raise my standing desk.

Verified Purchase · Austin, TX · Cosari ArcBeam 95

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Natalie S. — Columbus, OH1 week ago

Studio-grade lighting for $39.99 is an absolute steal

I nearly pulled the trigger on a $230 designer task lamp before reading this review. I ordered two of the Cosari ArcBeam 95s—one for my coding desk and one for my husband's drafting table. He uses the C-clamp, I use the heavy weighted base, and both of us are blown away by how smooth the dimming is.

Verified Purchase · Austin, TX · Cosari ArcBeam 95

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Frequently Asked Questions

Does it come with both a desk base and a clamp?

Yes. Every ArcBeam 95 ships with a weighted desktop base and a metal C-clamp with EVA pads. Both are in the box at no extra charge.

Will it clear my 27-inch or 32-inch monitor?

Yes. The dual arms reach up to 28.3 inches (720mm), which clears stacked monitors and curved ultrawides up to 34 inches.

Where are the controls?

On the front face of the light bar, within easy reach while seated. You swipe the touch slider to dim and tap to change color temperature.

Does it remember my settings?

Yes. When you turn it back on, it returns to your last brightness level and color temperature.

How thick a desk will the clamp fit, and will it scratch wood?

The clamp opens to 2.36 inches (60mm) and has dense EVA foam pads on both jaws to protect the desk surface. If your desk edge is beveled or blocked, use the weighted base instead.

How long is the power cord?

The UL-listed cord is 71 inches (1.8m) long, enough to reach a floor outlet from a raised standing desk.

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