A:AnswerNo they don't. They work with the Lifx family of smart lights. Lifx lights don't have a job so I'm not sure of it's even possible for them to play nice with hue.
A:AnswerThe LIFX website doesn't have a just the power supply but it does have a power supply and controller for the Z-Strip lighting; you can find it at https://www.lifx.com/collections/accessories/products/lifx-z-controller-pack.
A:AnswerIf you have a really small room, each Z-Strip controller can power up to 33 ft of lights. For larger rooms you would need to use more than one controller.
A:AnswerYou do not need a bridge to pair with Alexa devices. Unlike Phillips Hue which requires a hub. Just download the Alexa app and add skill. Simple and quick.