Yeelight Arwen 550S LED ceiling light, 50 W (YXDS0320002WTEU)

A smart ceiling lamp with a literal highlight: indirect colored backlight.

The ideal lighting at any time of the day - and more
The curvature at the edges of the lampshade makes the ceiling light appear particularly slim, while the frame provides the necessary stability and robustness for a long service life. The Arwen 550S is dimmable and, with its astonishingly high brightness, can completely illuminate rooms up to 25 m² - without dazzling, thanks to its glare-free surface.
In addition to brightness, the color temperature (from warm to cool white) can also be adjusted to adapt the lighting to the needs of the human biorhythm, a concept often referred to in technical terms as "Human Centric Lighting" (HCL). Just a few years ago, researchers discovered nerve cells in the retina of the eye that are not responsible for seeing, but rather set the human internal clock based on sunlight. Sunlight has a different light color at every time of the day, which tells our body what time it is. For example: A cool, bluish shade is like morning daylight and signals the beginning of the day to the body. These signals are passed on to the autonomic central nervous system, which in turn controls the hormonal glands and metabolism. Accordingly, using cold white light in the evening can lead to sleep disorders, while warm white light at noon can lead to tiredness and poor concentration.
Thanks to the adjustable color temperature (2700–6500 K), the smart Arwen ceiling lamps can imitate the color temperature curve of sunlight, providing people with exactly the right light at any time of the day. During the day, these are rather cooler tones (between 4000 K and 5500 K), which promote concentration and combat tiredness, and in the evening, rather warmer tones (between 2800 K and 3500 K), which exude comfort and prepare the body for sleep. There is also a special mode for the night, the moonlight mode, which is gentle on the eyes thanks to its soft light and illuminates the room just enough so that you don't bump into anything. In addition, the Arwen sets great color accents on the ceiling with indirect RGB light.
All these settings are available in the Yeelight app or the Xiaomi Home app. Since the Yeelight brand is part of the Xiaomi ecosystem and uses the same cloud server as Xiaomi, the devices are automatically added to both apps.


No more bland colors - furniture shines in all its strength
Over hundreds of thousands of years of evolution, the human eye has become accustomed to the natural light of the sun. Therefore, the more an artificial light source resembles sunlight, the more pleasant it is for the eye. The color rendering index (CRI or Ra value) indicates how lifelike colors are reproduced under a certain light source. Sunlight has the highest CRI value of 100. This means: The closer a lamp's value is to 100, the more similar it is to sunlight. The smart Arwen ceiling lamps use high-quality LEDs with a CRI of 95.


One lamp, many control options: app, language, light switch, remote control
You can control the light very conveniently via voice command (Google, Alexa, HomeKit, SmartThings) or via your smartphone using the Yeelight and Xiaomi Home apps. In addition, there are two further practical control options if you have a visitor or do not always want to open the app first: the Yeelight Bluetooth remote control and the Yeelight Bluetooth Smart Switch. The light switch is battery-operated and therefore does not need to be wired, but can be attached anywhere on the wall thanks to its self-adhesive back. Compared to a conventional light switch (which of course still works), the smart switch has a major advantage: If you switch off the lamp with the Bluetooth light switch, the current flow is not interrupted, and the lamps remain online in the app and connected to your voice assistant.
In the Yeelight app, you can set schedules so that the lighting turns on and off automatically at certain times. For example, you can fall asleep in the evening with the lights dimmed without them burning all night. Or you can gently wake up in the morning with slowly increasing light. You will find pre-programmed light scenes in the app, but you can also save your own favorite settings and apply them with just one click.


Installation and cleaning of a ceiling lamp has never been easier
The smart Arwen ceiling lights use a layered design for the lamp cover to prevent dust and insects from entering. As a result, the luminous surface remains shiny and clear without needing to be cleaned.
The clever design of the ceiling mount with a slide lock enables very quick and easy assembly and disassembly. Yeelight has already used this innovative design in previous models, so you can easily upgrade your old Yeelight ceiling light to a newer version. Only the lamp body needs to be replaced, not the holder - it takes less than 10 seconds!
As a lighting brand, Yeelight has explicitly specialized in smart lighting and has invested intensively in state-of-the-art technologies to provide the best possible quality. It is precisely for this reason that the globally known smart home device provider Xiaomi repeatedly uses Yeelight as a manufacturer for its own smart lighting products, such as the Xiaomi Bedside Lamp, Xiaomi Smart Desk Lamp, Xiaomi Smart LED Bulb, or Xiaomi Ceiling.

Yeelight Arwen 550S. Product color: White, Suitable location: Universal, Shape: Round. Bulb type: LED, Total power: 50 W, Light color: Cool white, Multi, Warm white. Energy efficiency class: F, Energy consumption per 1000 hours: 50 kWh, Energy efficiency scale: A to G. Height: 99.1 mm, Weight: 3.1 kg, Diameter: 55.5 cm. Quantity per pack: 1 pc(s)