One bulb, three settings. Works with your existing switch. - Now you can get the ambiance you want without having to install a dimmer switch. The Philips SceneSwitch bulbs work with your existing light switch. All you have to do is screw in the bulb, and flip the switch to toggle between 100%, 40%, and 10% brightness. Available in soft white and bright daylight Easy Installation - No more hassle with installation. Just fix or hang securely on the wall or ceiling, and plug it in. Your new light fitting is now ready to light up your room! Eye-Comfort - Light that's easy on the eyes - Poor quality light can cause eye strain. With many of us spending time indoors, it’s more important than ever to properly light your home. Our products meet stringent test criteria including flicker, strobe, glare, colour rendition and dimming effects to ensure they meet EyeComfort requirements Uniform Light Distribution - Throw light across your rooms in an even and uniform manner Long Lifetime - Lasts up to 20,000 hours. Your home is worth investing in - let Philips help