Link2Home Gu10 Wi-Fi Led Lamp With Rgb Pack 4The Link2Home Wi Fi LED Dimmable Bulb with RGB allows you to move across the white light spectrum, from a warm 2,700K all the way to a cool 6,500K. You can also choose from over 16 million different colours using the scroll wheel on the Link2Home Pro app (Free). Use the app to dim the bulb too. Control your home atmosphere via app control or voice. Using the Link2Home Pro app, you can set up precise timers which can be customised by days of the week.