Refoss MSL120HK-Refoss
Refoss Smart Bulb User Manual
Model: MSL120HK-Refoss
1. Introduction
Thank you for choosing Refoss Smart Bulbs. These A19 LED bulbs with E26 fitting offer versatile lighting solutions for your home, compatible with Apple HomeKit, Siri, Alexa, and Google Home. Enjoy features like color changing, dimming, scheduling, and remote control to enhance your smart home experience.
2. Safety Information
- Ensure power is off before installation or removal.
- Do not use with standard dimmers; control dimming via the app or voice assistant.
- For indoor use only.
- Avoid exposing the bulb to water or high humidity.
- Do not disassemble or modify the bulb.
3. Package Contents
The Refoss Smart Bulb package includes:
- 4 x Refoss Smart Wi-Fi Bulbs
- 1 x User Manual

Image: Refoss Smart Bulbs (4-pack) with compatibility logos.
4. Product Features
- Voice Control: Compatible with Apple HomeKit, Apple Watch, Siri, Alexa Echo, Echo Dot, and Google Home for hands-free operation.
- App Remote Control: Control your smart Wi-Fi light bulbs remotely via the Apple Home app or Refoss app (requires stable 2.4GHz Wi-Fi network). No hub required for direct control.
- Upgraded Version: Features 900LM warm white light, an upgraded antenna for stronger Wi-Fi signal, and increased LEDs for brighter light and more vibrant colors.
- Schedules and Energy Saving: Set timers and schedules (including sunrise/sunset mode) to automate lighting. Consumes only 9W, equivalent to a 60W incandescent bulb.
- Color Changing: Adjust from warm/cool white (2700K~6500K) to millions of RGBWW colors to suit any mood or occasion.
- User-friendly for Android: Works seamlessly with Android smartphones or tablets running OS 6.0 or higher via the Refoss app.
5. Setup Guide
5.1 Initial Installation
- Screw the Refoss Smart Bulb into a standard E26 light socket.
- Turn on the power to the light fixture. The bulb should light up.
5.2 Connecting to Wi-Fi and App
The Refoss Smart Bulbs require a 2.4GHz Wi-Fi network for initial setup and operation. Ensure your smartphone is connected to the 2.4GHz band of your Wi-Fi network during the setup process.
- Download the Refoss App: Search for "Refoss" in your device's app store (Apple App Store or Google Play Store) and install it.
- Create an Account: Open the Refoss app and follow the on-screen instructions to create a new account or log in.
- Add Device: In the Refoss app, tap the "+" icon to add a new device. Select "Smart Bulb" from the list.
- Pairing Mode: If the bulb is not flashing, you may need to reset it to enter pairing mode. To reset, turn the light bulb ON/OFF 5 times within 5 seconds, then leave it OFF for 5 seconds. The bulb will flash to indicate it's in pairing mode.
- Connect: Follow the app's instructions to connect the bulb to your 2.4GHz Wi-Fi network. This usually involves selecting your Wi-Fi network and entering the password.

Image: Remote control via the free Refoss app, highlighting 2.4GHz Wi-Fi connection.
5.3 Apple HomeKit Integration
For Apple HomeKit users, you can add the Refoss Smart Bulb directly to the Apple Home app:
- Ensure your iPhone/iPad is connected to the same 2.4GHz Wi-Fi network as the bulb.
- Open the Apple Home app.
- Tap the "+" icon and select "Add Accessory".
- Scan the HomeKit code located on the bulb or its packaging.
- Follow the on-screen prompts to assign the bulb to a room and name it.
To control your HomeKit accessories remotely, set up a HomePod, HomePod mini, or Apple TV as a home hub. A home hub is NOT needed for the Refoss app to control devices remotely.

Image: Refoss Smart Bulbs work with Apple HomeKit. A HomePod, HomePod mini, or Apple TV can serve as a home hub for remote control.
For more information on setting up a HomeKit hub, visit Apple Support.
6. Operating Instructions
6.1 Voice Control
Once connected to Apple HomeKit, Alexa, or Google Home, you can use voice commands to control your Refoss Smart Bulbs:
- "Hey Siri, turn the bedroom light to blue."
- "Alexa, set the smart bulb warmer."
- "Hey Google, brighten the smart bulb."
- "Turn on/off [Light Name]."
- "Dim/Brighten [Light Name]."
- "Set [Light Name] to [Color]."

Image: Voice control examples with Siri, Alexa, and Google Home.
Video: Demonstration of voice control with the Refoss Smart Bulb, showing changes between warm white, cool white, and RGB colors.
6.2 App Control
The Refoss app provides comprehensive control over your smart bulbs:
- On/Off: Toggle the light on or off from anywhere with internet access.
- Dimming: Adjust brightness levels from 1% to 100%.

Image: Adjusting brightness levels of the smart bulb.
- Color Changing: Select from 16 million colors or adjust white temperature (2700K-6500K).

Image: Using RGBWW light to simulate realistic color temperatures and vibrant colors.
- Scheduling: Set daily or weekly schedules for automatic turn on/off, including sunrise/sunset options.

Image: Setting schedules and timers for low electricity usage.
- Scene Customization: Create custom scenes to instantly change multiple bulbs to a specific color and brightness for different moods or activities.

Image: Customizing scenes to adjust light color temperature and colors.
7. Maintenance
- To clean the bulb, ensure power is off and the bulb is cool. Wipe with a soft, dry cloth.
- Do not use liquid or aerosol cleaners.
- Regularly check for firmware updates in the Refoss app to ensure optimal performance and security.
8. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Bulb not connecting to Wi-Fi. | Incorrect Wi-Fi band (5GHz instead of 2.4GHz), incorrect password, or bulb not in pairing mode. |
|
| Bulb frequently disconnects or is unresponsive. | Weak Wi-Fi signal, network interference, or router issues. |
|
| Bulb is not bright enough. | Brightness setting is too low, or expectations for lumen output. |
|
9. Specifications
| Attribute | Value |
|---|---|
| Brand | Refoss |
| Model Name | MSL120HK-Refoss |
| Light Type | LED |
| Special Feature | Color Changing |
| Wattage | 9 Watts |
| Bulb Shape Size | A19 |
| Bulb Base | E26 |
| Incandescent Equivalent Wattage | 60 Watts |
| Light Color | Multicolor (RGB & Warm/Cool White) |
| Voltage | 120 Volts (Accepted: 100-240V) |
| Unit Count | 4.0 Count |
| Color Temperature | 2700K-6500K |
| Brightness | 810 Lumens |
| Material | Polycarbonate (PC), Polyamide (PA) |
| Connectivity Technology | Wi-Fi (IEEE 802.11 b/g/n, 2.4GHz) |
| Indoor/Outdoor Usage | Indoor |
| Controller Type | Apple HomeKit, Google Assistant, Amazon Alexa, Siri, iOS |
| Certifications | FCC, UL |
10. Warranty and Support
Refoss products come with a standard manufacturer's warranty. Please refer to the product packaging or the official Refoss website for specific warranty terms and conditions.
For technical support, troubleshooting assistance, or any inquiries, please contact Refoss customer service through their official website or the contact information provided in the Refoss app.
You can also visit the Refoss Store on Amazon for more product information and support resources.
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