Wi-Fi Connected LED Bulb E27 ST64 4.2W CCT 2700-6500K
A decorative filament bulb that can be controlled without making any changes to the existing installation. Color temperature and brightness are adjusted via an app, making it possible to equip a hospitality venue, shop, or reception area with adjustable lighting without running a control line or installing a dimmer.
Technical specifications
E27 base, 220 - 240V (50-60Hz) power supply. 4.2W power for a light output of 400 lumens, giving an efficacy of 95 lm/W and an incandescent equivalent of 42W. Adjustable color temperature from 2700K to 6500K (CCT), CRI ≥ 80, 360° beam angle. ST64 amber glass tube, 6.4 cm in diameter and 14.3 cm high. Energy class F, IP20 protection rating (dry indoor use), permitted ambient temperature from -20°C to +40°C, lifespan of 25,000 h (L70B50). Integrated LED light source that is non-replaceable under 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), connects 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 bulb must remain permanently powered to stay reachable: on a job site, plan to disable or lock off 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 does not, 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 SSID and password for the 2.4 GHz network, and allow one to two minutes per light. Keep the smartphone, router, and bulb close together during pairing.
Operation
Remote switching on and off, dimming from 1 to 100%, continuous color temperature adjustment across the full 2700K - 6500K range, weekly scheduling by time slot, group control to operate multiple bulbs with a single command, scenes and automations, and multi-user sharing so several team members can control the lighting. Compatible with Amazon Alexa, Google Assistant, and Siri. Please note: this product is not compatible with physical dimmers (TRIAC, leading/trailing edge, 0-10V, DALI). Dimming is controlled 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 after it has cooled, screw the bulb into the E27 socket without overtightening, then restore power: it starts up 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 each fixture location before deployment.
Professional applications
Bars, restaurants, tea rooms, hotels and guesthouses, shops and display windows, coworking spaces, and reception areas: anywhere the lighting ambiance needs to change throughout the day in open fixtures where the light source remains visible. The ST64 filament shape preserves the vintage aesthetic expected in hospitality venues 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: improper installation, use exceeding 12 h/day, product modification, unsuitable environment, power surges, connection to a physical dimmer, and accidental damage. The batch number is printed on the packaging. Return requests must include the product reference, batch number, description of the defect, proof of purchase, and photos.
