This 24w LED downlight from the makers at All LED is colour selectable meaning that you can change the colour temperature of the light between 3000k 4000k and 6000k depending on your preference. The 24w downlight in particular has a depth of 25mm a cutout size of 225mm and a full diameter measuring 240mm. He includes a clip on either side to install the downlights and they are also flicker free and energy efficient due to them being LEDs.