Truopto gu10 led 4 x 1w spotlights truopto gu10 4x1w dimmable a 4w mains led spotlight lamp that is a direct low energy retrofit replacement for traditional tungsten halogen types in a wide range of lighting applications uses the latest high intensity led emitter technology and is compatible with industry standard gu10 socket downlight fittings truopto gu10 4x1w dimmable led bulb gu10 4x1w warm white