Halogen Osram Haloline Star 64705 300W 230V R7s linear halogen eco lamps use a special infra red reflective coating on the inside of the envelope and a low conductivity xenon gas filler to help reduce heat loss from the filament.
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Halogen Osram Haloline Star 64705 300W 230V R7s linear halogen eco lamps use a special infra red reflective coating on the inside of the envelope and a low conductivity xenon gas filler to help reduce heat loss from the filament.