Kasa Smart LED Light Strip, 16.4ft WiFi LED Strip Works with Alexa, Google Home, SmartThings (KL400L5)
Quick take
The Kasa Smart KL400L5 is a Wi-Fi RGB light strip designed for simple installation, rich color, and everyday smart control through the Kasa app and voice assistants like Alexa and Google Home. It supports scheduling, timers, animated preset effects, and smart features like grouping and Smart Actions. The main tradeoff is that it is RGB and not water resistant, so it’s best for indoor décor and buyers who are okay with color-style lighting instead of advanced individual-address LED control.
Pros and cons
Pros
- Vibrant, saturated RGB color with high brightness (common praise in buyer feedback).
- Works with the Kasa app and voice control (Alexa and Google Assistant).
- Supports schedules, timers, and animated preset effects for scenes and ambiance.
- Adjustable length with cut-and-bend flexibility, plus included 3M adhesive backing.
- Grouping and Smart Actions add “scene” control across multiple Kasa devices.
Cons
- It is RGB, not fully addressable per LED, which limits ultra-detailed effects.
- Not water resistant, so it is not ideal for outdoor or wet locations.
- Some buyers may find brightness less than expected if they need extremely high-output RGB lighting for large spaces.
What buyers think
Buyer feedback centers on three themes: color and brightness, ease of setup, and smart-home responsiveness. Reviews frequently describe the LEDs as vivid with good saturation, and multiple buyers mention the strip gets bright enough for typical room accent lighting. Setup is also praised as straightforward, with app onboarding and voice control working smoothly. On responsiveness, buyers report that commands and scene changes feel quick, with minimal lag. A smaller number of notes focus on feature expectations, especially around advanced per-LED control and expectations for maximum brightness, but the overall sentiment trends positive for everyday smart décor use.
Why this Kasa Smart light strip works for a lot of homes
If you want a Wi-Fi RGB strip that you can actually use day to day, the Kasa KL400L5 focuses on that experience. It’s built for indoor room décor and “entertainment zone” lighting, with animated preset effects for changing ambiance without needing to program anything complicated. From a usability standpoint, the combination of app control, voice control, and automation features (schedules, timers, away mode, grouping, and Smart Actions) is the difference between a strip you admire once and one you use routinely.
Key features and specs that matter
RGB color, brightness, and built-in lighting effects
This strip delivers multicolor RGB lighting with customization up to 16 million colors and is designed for high brightness and saturation. It also includes animated lighting effects and preset scenes, which makes it easier to get party, movie, and general ambiance looks quickly.
App and voice control, plus routines
Control is available through the Kasa app, and it supports voice control with Alexa and Google Assistant. You can adjust brightness, change colors, and use schedules and timers. There is also away mode for automatic behavior when you are not home.
Grouping and smart actions
For multi-room or multi-device setups, grouping lets you coordinate multiple Kasa Smart devices together using a scene you customize. Smart Actions supports sequences that can react to events, such as turning lights on when your Kasa camera detects motion.
Adjustable length and placement flexibility
The strip is designed to be trimmed and adjusted so you can fit it to your layout. It uses included 3M adhesive backing for mounting along surfaces. One practical installation note is that the KL400 and its controller need to be connected in the direction indicated by the product’s connection guide (this matters when you are trimming and routing).
Power and electronics basics
- Indoor use (not water resistant).
- 12V system, rated wattage 13.5W.
- Wi-Fi connectivity, controller supports app and voice control, plus basic on-device control options.
Pros and cons for different kinds of buyers
Best for
- People who want an easy smart LED strip setup for entertainment lighting, desk lighting, or room accents.
- Buyers who prefer RGB color scenes with animated presets, schedules, and voice control.
- Homes with Alexa or Google Assistant, and users who already own other Kasa Smart devices for grouping and Smart Actions.
- Anyone who needs cut-to-length flexibility for a specific installation area.
Who should think twice
- Shoppers looking for per-LED addressable effects, where each individual diode can be controlled independently.
- Those planning to mount near moisture or outside, since it is not water resistant.
- Buyers who need very high-output RGB lighting for large rooms or ceiling-level brightness.
Comparison points to consider (without naming specific brands)
If you are comparing smart LED strips, focus less on the color count and more on what you can do with it. Ask:
- Do you want RGB scenes and automation, or do you need individually addressable effects?
- Will you mount it indoors only, since weather protection may be a deal breaker?
- Do you want Wi-Fi with app control (and voice assistants), or are you okay with a more limited controller ecosystem?
- Does the included length and controller setup match your layout, including whether you expect to split or run continuously?
Verdict
The Kasa Smart KL400L5 is a solid choice for indoor RGB accent lighting when you want rich color, preset animations, and practical automation. It stands out for setup ease and day-to-day control, especially if you already use Kasa and want grouping or camera-triggered Smart Actions. If your goal is ultra-detailed per-LED effects or outdoor/wet-location lighting, you may want to look for a different category of strip or a more weather-ready model.
FAQ
Is the Kasa Smart KL400L5 water resistant?
No. It is designed for indoor use only, so it is not a good fit for outdoor or wet locations.
Does it work with alexa and google home?
Yes. The strip supports voice control through Alexa and Google Assistant, and it can also be managed in the Kasa app.
Can I cut the light strip to fit my space?
Yes. The strip is adjustable, with the ability to trim to length and use the included 3M adhesive backing for mounting.
Is this an addressable LED strip with individual control per diode?
No. It is an RGB strip, so expectations for per-LED addressable control and highly granular effects may not match what this kit is built to do.
What automations can I set up?
You can use schedules and timers, plus features like away mode. With Kasa devices, grouping and Smart Actions can coordinate lighting based on customized scenes and events.
Is it bright enough for room accent lighting?
Many buyers describe the brightness and color saturation as strong for accent lighting, and some mention running at partial brightness. If you need extremely high-output RGB for very large areas, brightness expectations may be something to verify for your specific setup.
What is the recommended way to install it?
Plan your route, trim to the needed length, mount using the included 3M adhesive, and make sure the strip-to-controller connection direction follows the connection guide before powering on.
Specifications
| Product Title | Kasa Smart LED Light Strip, 16.4ft WiFi LED Strip Works with Alexa, Google Home, SmartThings, High Brightness with 16 Million Colors, RGB, Grouping, Adjustable Length, Up to 25,000 Hours (KL400L5) |
|---|---|
| Category | Tools & Home Improvement > Lighting & Ceiling Fans > Novelty Lighting > LED Strip Lights |
| Brand | Kasa Smart |
| Manufacturer | TP-Link |
| Model Number | KL400L5 |
| Color | Multicolor |
| Item Weight | 0.16 Kilograms |
| Indoor Outdoor Usage | Indoor |
| Additional Features | Adjustable, Color Changing, Dimmable, Remote Controlled, Timer |
| Light Source Type | LED |
| Power Source | AC |
| Light Color | RGB |
| Controller Type | App Control, Button Control, Remote Control, Voice Control |
| Voltage | 12 Volts |
| Wattage | 13.5 watts |
| Control Method | Voice |
| Smart Home Compatibility | Smart Home Compatible |
| Wireless Communication Technology | Wi-Fi |
| Water Resistance Level | Not Water Resistant |
| Connectivity Technology | Wi-Fi |
| Connectivity Protocol | Wi-Fi |
| Material Type | Polyimide |
| Theme | Movie |
| Occasion | Party, Christmas |
| Product Style | 16.4 ft |
| hanging_pattern_layout | Linear |
| Form Factor | Light Strip |
Available variants
Color
- Multicolor
Size
- 32.8 Ft
- 16.4 Ft
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