Excellent lighting units. Currently set to warm but will switch over to the daylight setting later. Simple to wire-up, I simply pushed on the spring connectors and slid in the wires. I wired mine up with power entering on the left connectors and the wire going to the next light installed on the right connectors.The spring connectors grip the wires firmly. I went from an 85mm cut-out to a 67mm cut-out to install these. To do that I had to use space-reducers which lampsonline didn't appear to sell but the ones from downlight magic worked perfectly and a bit of filler. Really very pleased.