https://hackernoon.com/integrating-dumb-lights-in-my-smart-home-philips-hue-busch-jaeger-zigbee-homekit-658bfdfd1cd0

Note: I live in the Netherlands, so everything that is explained with regards to electrical form factors and wiring applies to the European area only.

It started with a hard to reach light switch in the bedroom. Because of the way the room was reconstructed, the entrance ended up on the opposite side of where the main light switch is. It meant stumbling and cursing through the dark looking for the switch every time you enter at night. Rewiring the room to place a switch near the entrance proved almost impossible, so I figured I’d try one of these Philips Hue starter kits — two ‘smart’ light bulbs and a bridge to hook them up to your home network — to see if that would solve my problem. That choice proved to be a gateway drug because now, eight months later, I’ve got sixteen smart bulbs, three light strips, two in-wall smart dimmers for the ‘dumb’ lights, several wireless remote controls, motion sensors and some software to make it all work together seamlessly.