Shelly Duo Bulb E27 Gen3
Shelly Duo Bulb E27 Gen3
Shelly Duo Bulb E27 Gen3 is a third-generation smart LED bulb that redefines connected lighting by incorporating an incredibly powerful ESP32-C3 microcontroller directly into the classic bulb design. It provides up to 800 lumens of high-quality, adjustable white light (from warm to cool) with perfectly smooth, flicker-free dimming, ensuring maximum visual comfort.
Because it uses the Shelly Gen3 architecture, this bulb is much more than just a light source – it acts as an active infrastructure hub in your smart home. It can function as a Wi-Fi range extender and a Bluetooth (BLE) gateway, helping to bridge the gap between your router and more distant smart home sensors.
Key features
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Adjustable white light and flicker-free dimming: Seamlessly adjust the color temperature from a cozy, warm 2700K for evening relaxation to a crisp, stimulating 6500K for daytime focus. Custom electronic components ensure perfectly smooth, flicker-free dimming from 1% to 100%.
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Dual network hub: Thanks to the built-in Gen3 chip, the bulb serves as a Wi-Fi range extender and Bluetooth (BLE) gateway. Simply by screwing it into a central socket, it strengthens your local Wi-Fi network and enables sensors that use only Bluetooth to communicate with your main network.
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Built-in power monitoring: It features real-time energy metering, allowing you to accurately track your lighting power consumption and optimize daily routines to reduce your electricity bill.
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Advanced automation and scripting: 8 MB of flash memory and an internal processor allow for the execution of complex local scripts (mJS), HTTP webhooks, and up to 20 local schedules without requiring any cloud connection.
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Extensive protocol support: It operates 100% locally with support for MQTT, UDP, and REST API. It works perfectly out of the box with Home Assistant, Apple HomeKit, Google Home, Amazon Alexa, and Samsung SmartThings platforms.
Technical specifications
| Feature | Specification |
| Model | Shelly Duo Bulb E27 Gen3 (S3BL-D010009AEU) |
| Socket type | Standard E27 |
| Microcontroller (MCU) | ESP32-C3 (40 MHz) with 8 MB Flash memory |
| Wireless protocols | Wi-Fi (802.11 b/g/n 2.4 GHz), Bluetooth 4.2 (BLE) |
| Light type / CCT | Tunable White LED / 2700K – 6500K |
| Luminous flux | Up to 806 lumens |
| Power consumption | 8.5 W / 9 W (equivalent to ~60 W incandescent bulb) |
| Power monitoring | Yes (built-in power metering) |
| Beam angle | 180° - 200° |
| Estimated lifetime | ~15,000 hours |
| Platform compatibility | Shelly Smart Control, Home Assistant, MQTT, HomeKit, Alexa, Google Home |
| Dimensions | 60 mm (diameter) × 108 - 110 mm (length) |
| Weight | ~34 - 44 g |
Package contents
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Shelly Duo Bulb E27 Gen3 smart bulb
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Quick start guide