Halostar Oven Capsule. The Osram Halostar Oven Lamp is suitable for pyrolytic ovens and can stand high ambient temperature, up to 450°C. This Oven capsule lamp delivers two to three times the luminous efficiency of conventional oven lamps and features optimum halogen content and tempered pins for reliable contact at high temperatures. The base pins are tempered to protect against corrosion The axial filament ensures optimum directional light High illuminance level Suitable for pyrolysis (permissible ambient temperature 450°C) Contains no mercury Applications in backing ovens