be quiet!
be quiet! Light Wings LX 140mm PWM high-Speed PC Case Fan | Black | BL129
Bottom line: The be quiet! Light Wings LX 140mm PWM high-Speed PC Case Fan ($19.90 on Amazon as of 2026-10-20 16:26 UTC): Up to 2.45mm/H2O static pressure for radiators and restrictive fan grills; main trade-off: listing gives no max rpm, airflow (CFM) or noise rating to compare.
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*Price sourced from Amazon.com. Last updated 2026-10-20. Price and availability subject to change.
Pros & Cons
Pros
- ✓ Up to 2.45mm/H2O static pressure for radiators and restrictive fan grills
- ✓ 16 hub LEDs light frosted blades for an even ARGB glow
- ✓ Closed loop motor holds target rpm against radiator or grill resistance
- ✓ ARGB input and output connectors daisy-chain multiple Light Wings LX fans
- ✓ 9 optimized blades on a 140mm frame for demanding cooling setups
Cons
- ✗ Listing gives no max rpm, airflow (CFM) or noise rating to compare
- ✗ High-speed variant; quiet-first builds should check dB specs before buying
- ✗ Lighting needs a motherboard ARGB header or a separate ARGB controller
- ✗ 140mm frame only fits 140mm mounts, not 120mm-only fan slots
Manufacturer description
The be quiet! Light Wings LX 140mm PWM high-speed fan is built for builders who want ARGB lighting and real static pressure from the same fan. Sixteen LEDs sit inside the impeller hub and shine outward onto frosted fan blades, giving you an even glow that suits showcase cases built around ARGB. The fan is not just for looks. Nine optimized blades push up to 2.45mm/H2O of air pressure, so it works as a radiator fan on a water-cooled loop and as an intake or exhaust fan in an air-cooled build. The closed loop motor works like cruise control. When a radiator or fan grill slows the blades, the…
SpecPicks Verdict
SpecPicks scored be quiet! Light Wings LX 140mm PWM high-Speed PC Case Fan using a rating × review-volume × price-fit model applied to published specs and reviews across the pc cases category. be quiet!'s pc cases lineup sits within the broader category mid-tier; price and specs are the deciding factors over brand loyalty here. Judge it on the specification table and the price rather than on sentiment: check the figures that decide your use case, then put it side-by-side with two or three close alternatives in the Compare tool before clicking through.
Common buyer scenarios for pc cases of this kind: matching it to an existing build, replacing a failing part, or upgrading from a previous-generation equivalent. Check the spec table below against your current setup — particularly socket / form-factor / power-rating fields — and confirm compatibility on the retailer's listing before purchase. Prices and stock are set by the retailer and may have moved since this page was last updated.
Frequently Asked Questions
Is the be quiet! Light Wings LX 140mm high-speed fan good for a radiator?
Yes. It produces up to 2.45mm/H2O of static pressure with 9 optimized blades, and be quiet! positions it for both water-cooled radiators and air-cooled systems.
How do I connect the ARGB lighting?
The ARGB cable has an input and an output connector. Plug the input into your motherboard's ARGB header or an ARGB controller, and use the output to daisy-chain additional Light Wings LX fans.
How many LEDs does the Light Wings LX 140mm have?
It has 16 LEDs inside the impeller hub. They shine outward onto frosted fan blades, so the light spreads across the whole blade surface.
Will the fan slow down behind a dust filter or fan grill?
The closed loop motor monitors the actual fan speed and raises it back to the target rpm when resistance from a grill, filter or radiator slows it down, so it holds your set speed.
What is the maximum rpm, noise level and warranty?
The product context does not list rpm, noise level or warranty terms. Check the be quiet! product listing or the manufacturer's spec sheet for current figures and warranty coverage.
Key Features
- Light Wings LX 140mm PWM high-speed undeniably upgrades all kind of PC cases with its spectacular lighting. Especially show cases with an emphasis on ARGB illumination benefit from this fan. Add a bunch of them to your showcase and let friends and family gaze in awe.
- 16 LEDs are located inside the hub of the impeller of the Light Wings LX 140mm PWM high-speed and shine outwards onto the frosted fan blades. This creates an unmistakable look and enables you to express your creativity.
- With a remarkably high air pressure of up to 2.45mm/H2O, Light Wings LX 140mm PWM high-speed is the best choice for water-cooled and air-cooled systems alike. The 9 optimized fan blades provide enough air pressure to make this fan work great even in demanding configurations.
- Light Wings LX 120mm PWM high-speed features a closed loop motor. This technology is comparable with the cruise control in cars. When working against resistance, for example a fan grill or radiator, fans spin slower as a result. The closed loop motor technology constantly monitors the current fan speed and increases it to the target rpm, if necessary. As a result, Light Wings LX 140mm PWM high-speed always operates at the desired speed, no matter the air resistance.
- The ARGB connection cable comes with an input and an output connector. The input can be used to connect the fan to your motherboard or to an ARGB controller, but also to daisy-chain it with the output connector of other Light Wings LX fans.
Full Specifications
| Brand | be quiet! |
|---|---|
| Model | BL129 |
| Voltage | 12 volts_of_direct_current |
| Wattage | 5.4 watts |
| Material | Metal, Plastic |
| Set Name | PWM High-Speed |
| Unit Count | 1 Count |
| Noise Level | 31 db |
| Part Number | BL129 |
| Compatibility | PC |
| Material Type | Metal, Plastic |
| Cooling Method | Air |
| Number of Items | 1 |
| Number of Packs | 1 |
| Compatible Devices | Desktop |
| Power Connector Type | 4-Pin |
| Maximum Rotational Speed | 2200 rpm |
| Global Trade Identification Number | 04260052191675 |
Ready to buy?
be quiet! Light Wings LX 140mm PWM high-Speed PC Case Fan | Black | BL129 is listed on Amazon. Price, availability, shipping and returns are set by Amazon and its sellers — check the listing for current terms. SpecPicks earns a small commission on qualifying purchases — thank you for supporting independent review work.
*Price sourced from Amazon.com. Last updated 2026-10-20. Price and availability subject to change.
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