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The sputtering deposition (SPD) technique applicable for infra-red reflecting (IR) film coating on ellipsoidal bulbs of halogen lamps was investigated. To realize a uniform IR layer coating on such bulbs, a specifically designed spin and swing motion mechanism for coating bulbs and a novel monitoring system for controlling the coating layer thickness were developed. The IR film coating produced by the SPD processes is shown to offer a worthwhile energy saving of approximately 17% of the lamp power consumption.