1. Introduction
The Sengled Smart Light Bulb Full Color A19 (Model W31-N15) offers advanced lighting control for your home. This smart LED bulb connects directly to your 2.4GHz Wi-Fi network, eliminating the need for a separate hub. Control your lighting through the Sengled Home app or via voice commands with Google Assistant.

Image: Sengled Smart Light Bulb Full Color A19 product packaging and two bulbs.
2. What's in the Box
- 2 x Sengled Smart Light Bulb Full Color A19 (Model W31-N15)
- 1 x Quick Start Guide (refer to this manual for detailed instructions)
3. Specifications
| Feature | Detail |
|---|---|
| Model Number | W31-N15 |
| Bulb Shape Size | A19 |
| Bulb Base | E26 |
| Light Type | LED |
| Light Color | Full Color (16 Million Colors) & Tunable White (2000K-6500K) |
| Brightness | 800 Lumens |
| Color Rendering Index (CRI) | 90+ |
| Power Consumption | 12 Watts |
| Incandescent Equivalent | 60 Watts |
| Voltage | 100-120 Volts, 60 Hertz |
| Connectivity | 2.4GHz Wi-Fi (5GHz not supported) |
| Control Method | Sengled Home App, Voice Control (Google Assistant) |
| Average Life | 25,000 Hours |
| Material | Synthetic Polymer (PMMA) |
| Product Dimensions | 2.3"W x 4.2"H |
4. Setup Instructions
Follow these steps to set up your Sengled Smart Light Bulb:
- Download the Sengled Home App: Search for "Sengled Home" in the Apple App Store or Google Play Store and install the application on your smartphone. Create an account or log in if you already have one.
- Install the Bulb: Screw the Sengled Smart Light Bulb into a standard E26 light socket. Ensure the power is turned off before installation. Turn the power on after installation.
- Connect to Wi-Fi: Open the Sengled Home app and follow the in-app instructions to add your new device. Ensure your smartphone is connected to a 2.4GHz Wi-Fi network, as the bulb does not support 5GHz networks. The app will guide you through connecting the bulb to your home Wi-Fi.
- Pair with Voice Assistant (Optional): If you wish to use voice control, link your Sengled Home account with Google Assistant through their respective apps.

Image: Visual guide for the three-step setup process: download the Sengled Home app, install the bulb, and complete in-app guided setup.

Image: The Sengled Home app icon and a smartphone screen showing the process to link with Alexa for voice control.
5. Operating Instructions
Once set up, you can control your smart light bulb using the Sengled Home app or voice commands.
5.1 App Control (Sengled Home App)
- On/Off: Tap the power icon next to the bulb in the app to turn it on or off.
- Brightness Adjustment: Use the slider in the app to adjust the light intensity from 1% to 100%.
- Color Selection: Access the color wheel in the app to choose from 16 million colors. You can also select various shades of white, from warm (2000K) to cool (6500K).
- Custom Scenes: Create and save personalized lighting scenes with specific colors and brightness levels for different moods or activities.
- Schedules and Routines: Set timers for the bulb to turn on/off automatically at specific times. Create routines for gradual dimming (sleep mode) or brightening (wake-up mode).
- Group Control: Group multiple Sengled bulbs together in the app to control them simultaneously with a single command.

Image: A smartphone screen showing the Sengled Home app's color selection interface, demonstrating the ability to create custom scenes with 16 million colors.

Image: The Sengled Home app displaying a 'Rooms' interface, illustrating how to control multiple bulbs across different areas of a home simultaneously.

Image: Two images showing a person sleeping, with clocks indicating 10:00 PM (lights dimming for sleep) and 6:00 AM (lights gently brightening for wake-up).
5.2 Voice Control (Google Assistant)
After linking your Sengled Home account to Google Assistant, you can use voice commands to control your bulbs. Examples include:
- "Hey Google, turn on the living room light."
- "Hey Google, dim the bedroom light to 50%."
- "Hey Google, change the kitchen light to blue."
- "Hey Google, set a 'date night' scene."

Image: A couple at a dining table, with a speech bubble indicating the voice command "Alexa, start date night," demonstrating hands-free control for custom routines.

Image: A man in a kitchen using a voice command, "Alexa, Dim the room light to 80%," with a smart speaker shown responding with "Okay!".
6. Troubleshooting
If you encounter issues with your Sengled Smart Light Bulb, consider the following:
- Bulb Not Connecting/Offline:
- Ensure your Wi-Fi router is powered on and functioning correctly.
- Verify that your router is broadcasting a 2.4GHz Wi-Fi network. Sengled bulbs do not support 5GHz Wi-Fi.
- Check the distance between the bulb and your Wi-Fi router. Obstructions or excessive distance can weaken the signal.
- Try resetting the bulb by turning it off and on five times (each cycle lasting about 1 second). The bulb should flash to indicate a successful reset. Then attempt to re-pair it through the Sengled Home app.
- App Not Responding/Login Issues:
- Ensure your smartphone has a stable internet connection.
- Check for updates to the Sengled Home app in your app store.
- Close and reopen the app. If the issue persists, try reinstalling the app.
- Verify your login credentials.
- Voice Control Not Working:
- Confirm that your Sengled Home account is correctly linked to your Google Assistant account.
- Ensure your voice assistant device (e.g., Google Home speaker) is online and responsive.
- Use the exact names you assigned to your bulbs or groups in the Sengled Home app when giving voice commands.
- Randomly Turning On/Off:
- Check for any active schedules or routines in the Sengled Home app that might be causing this behavior.
- Ensure no other users with access to your smart home system are controlling the bulb.
- Verify that there are no external smart home integrations or automations (e.g., IFTTT) inadvertently controlling the bulb.
7. Maintenance
The Sengled Smart Light Bulb requires minimal maintenance:
- Cleaning: Ensure the bulb is powered off and cool before cleaning. Wipe the bulb with a soft, dry cloth. Do not use liquid cleaners or abrasive materials.
- Handling: Handle the bulb with care to avoid damage. Do not disassemble the bulb.
- Storage: If storing the bulb, keep it in a cool, dry place away from direct sunlight and extreme temperatures.
8. Warranty and Support
Your Sengled Smart Light Bulb is covered by a 3-year manufacturer's warranty from the date of purchase. This warranty covers defects in materials and workmanship under normal use.
For technical support, warranty claims, or additional information, please visit the official Sengled website or contact their customer service department. Refer to the packaging or the Sengled Home app for specific contact details.
For a comprehensive user guide in PDF format, you may refer to the Official Sengled User Guide (PDF).





