Knightsbridge 230V GU10 Track Spotlight 40W max. - Black (TRKSP8B) | Light Shop Direct
ILC GU10 LED Light Bulb, 40 Watt Equivalent Color Changing 12 Colors 5W Dimmable Warm White 2700K RGB LED Light Bulbs with Remote Control (Pack of 4) - Amazon.com
InLight INL-34400: 6w GU10 CCT LED spot bulb, 3000k, 4000k, 6000k, non dimmable, 120° beam, 500lm =40w - from £3.31