What Is a GU10 Bulb? Wattage, Beam Angle & Colour Temperature Explained
GU10 is a fitting type, not a brand, and it's the near-universal standard across residential spotlights. This guide covers what to actually buy: 2–10W LED replaces 25–50W halogen at the same brightness, narrow beams for artwork, medium for kitchens, wide for general ambience, and why the same wattage reads brighter with a narrower beam.