A:Answer This will depend on what your expectations and requirements are.
You will need at least one piece of hardware -- the Hue hub which you can buy as part of a starter kit. Regardless, the Hub does not help with motion detection.
If you want the bulb to turn on when someone enters a particular room, then yes, you'll need a motion detector and most likely an advanced home automation hub like SmartThings. This bulb does not come with any motion detecting capabilities built in. The Hub does not come with any motion detecting capabilities either as far as I'm aware.
If you just want the bulb to turn on at a certain time of the day (say 6:30 AM), you can program a Routine in the Hue app to turn the bulb on without any additional hardware.
If you just want to control the bulb via an app, again, you can use the Hue app to turn the bulb on without any additional hardware.