Yes, you can. It then simply switches on in the default setting, i.e. in white. At least that's how it is for me. You can switch it on and off as a normal light bulb using the wall switch. If you then want to change the colours or brightness, you can do this with the Hue app on your mobile via Bluetooth. Philips also has an additional switch, the "hue Dimmer Switch", which you can attach to the wall. However, it is important to know that this can only be connected to the bulb via the Philips Hue Bridge.