LED Strip Beam Angle: 120 vs 180 vs 360 Degrees Explained
- 2026-09-15 18:00
- /
- Arraystar LED
LED strip beam angle determines how light spreads: standard SMD strips emit roughly 120°, COB strips achieve up to 180° with a continuous dot-free beam, and LED neon flex glows a full 360° around the tube. Choose 120° for concealed indirect light, 180° COB for visible shadow-free strips, and 360° neon for lettering, coves and wrap-around effects.
What Does Beam Angle Mean for LED Strip?
Beam angle is the angular spread of light from the LED source. It decides how wide an area a strip illuminates, whether you see bright spots (dots) or an even wash, and how the light interacts with channels and diffusers.
120° vs 180° vs 360°: Side by Side
| Beam Angle | Typical Type | Light Pattern | Best For |
|---|---|---|---|
| 120° | SMD 2835/5050 | Directional, visible dots | Hidden indirect lighting, channels with diffusers |
| 180° | COB | Continuous line, no dots | Visible strips, shelves, coves, task lighting |
| 360° | Neon flex tube | Omnidirectional glow | Sign letters, tree wrap, architectural accents |
Why COB's 180° Beam Is a Game Changer
COB (chip-on-board) places hundreds of tiny chips in a continuous phosphor line, producing a single continuous light source with up to 180° distribution. Compared with SMD's discrete 120° cones, COB delivers shadow-free, dot-free illumination that looks like a fluorescent tube — the reason it dominates premium architectural and kitchen lighting in 2025-2026.
360° Neon Flex: The Designer's Favorite
LED neon flex embeds the strip inside a flexible silicone tube, spreading light a full 360° around the profile. Combined with vertical/horizontal bending capability, it creates seamless glowing lines for brand lettering, bar counters, stair handrails and facade tracing. Our ART-NS2010 series bends vertically (S-shape) for 2D creative layouts without hot spots.
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How to Choose per Project
- Hidden cove light → 120° SMD is fine; the diffuser does the work.
- Visible strip under cabinets/shelves → choose 180° COB for premium dot-free look.
- Sign letters and curves → 360° neon flex with vertical bend capability.
- Outdoor facade lines → 180° COB in IP67 extrusion, or 360° IP68 neon.
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Frequently Asked Questions
Is a 180° COB strip brighter than 120° SMD?
For the same wattage, COB distributes light over a wider angle, so it looks more even rather than brighter. Compare lumens per meter for absolute brightness.
Can I see LED dots with a 120° strip?
Yes, unless you use a frosted diffuser channel. That is why visible strip installations increasingly use COB.
Does beam angle affect dimming?
No — beam angle is about optics; dimming depends on the driver and controller.
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