42W = 50W MR16 Halogen BulbTechnical SpecificationWattage: 42WEquivalent Wattage: 50WType: MR16End Cap: GU5.3Lumens: 640Energy Rating: DTechnical Specification:Colour: Warm White Cap Type Code: GU5.3 Wattage: 42W Zexum 42w = 50w MR16 Halogen Bulb.