Product Name:Halogen lamp GU10 35W +C (35mm) , Mini Halogen Bulb 35W GU10 , Mini GU10,
Here is one fitted to my Mathmos Astro..
Voltage :230V Lumens :195LM
Beam Angle:30°Life Span:2000 Hours
Wattage :35WSize: φ35 x 46mm height
Color :Warm White 2700k-3000k