Wi-Fi Connected LED Bulb E27 ST64 4.2W CCT 2700-6500K
A decorative filament bulb that can be controlled without any modification to the existing installation. Hue and brightness are adjusted via an app, making it possible to equip a hotel, restaurant or café, shop or reception area with adjustable lighting without running a control line or installing a dimmer.
Technical specifications
E27 base, 220 - 240V power supply (50-60Hz). Power: 4.2W for a luminous flux of 400 lumens, giving an efficacy of 95 lm/W and a 42W incandescent equivalent. Adjustable color temperature from 2700K to 6500K (CCT), CRI ≥ 80, 360° beam angle. Amber glass ST64 tube, 6.4 cm in diameter and 14.3 cm high. Energy class F, IP20 rating (dry indoor use), permitted ambient temperature from -20°C to +40°C, lifespan 25,000 h (L70B50). Integrated LED light source is non-replaceable within the meaning of ErP Regulation 2019/2020. CE compliance: RED Directive 2014/53/EU, LVD 2014/35/EU, EMC 2014/30/EU, RoHS 2011/65/EU and Regulation (EU) 2019/2020.
Network architecture
Built-in 2.4 GHz Wi-Fi module (2.412 - 2.472 GHz, transmit power 20 dBm), connecting directly to the site router: no hub, gateway or control bus required. The 5 GHz band is not supported — on routers broadcasting both bands under a single SSID, the 2.4 GHz band must be isolated during pairing. The Lbulb must remain permanently powered to stay reachable: on a construction site, plan to disable or lock the wall switch for the circuit concerned.
Setup and app
Control is via the Silumen Home app (App Store / Google Play), also compatible with Tuya Smart and Smart Life. After creating an account, power on the bulb: it should flash twice per second. If it doesn’t, perform an ON-OFF-ON-OFF-ON cycle until it flashes rapidly. In the app, tap “+”, then “Lighting” and “Light source (BLE + Wi-Fi)”, enter the 2.4 GHz network SSID and password, and allow one to two minutes per light. Keep the smartphone, router and bulb nearby during pairing.
Operation
Remote on/off, dimming from 1 to 100%, continuous color temperature adjustment across the full 2700K - 6500K range, weekly scheduling by time slots, group control to operate a set of bulbs with a single command, scenes and automations, and multi-user sharing so several team members can control the lights. Compatible with Amazon Alexa, Google Assistant, and Siri. Important: this product is not compatible with physical dimmers (TRIAC, leading/trailing edge, 0-10V, DALI). Dimming is done exclusively via the app; do not connect to an existing dimmed circuit.
Installation
Switch off the power at the circuit breaker, remove the old light source once it has cooled, screw the bulb into the E27 socket without overtightening, then restore power: it starts in warm white by default. Do not install in an enclosed fixture without ventilation; maintain a minimum distance of 0.5 m from the illuminated object. Check Wi-Fi coverage at the location of each fixture before installation.
Professional Applications
Bars, restaurants, tea rooms, hotels and bed and breakfasts, shops and display windows, coworking spaces, and reception areas: anywhere the lighting atmosphere needs to change throughout the day in open fixtures where the light source remains visible. The ST64 filament format retains the vintage look expected in hospitality settings while eliminating the need for a dimmer in the installation.
Warranty and After-Sales Service
2-year warranty from the date of purchase, upon presentation of proof of purchase. Covers manufacturing, material, and assembly defects. Exclusions: incorrect installation, use exceeding 12 hours per day, product modification, unsuitable environment, power surges, connection to a physical dimmer, and accidental damage. The batch number is shown on the packaging. Return requests must include the product reference, batch number, description of the defect, proof of purchase, and photos.
