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