USING TWO THERMAL SWITCHES TO CONTROL A HYBRID LAMP

摘要

A lamp assembly (100) comprises both an instant light (140) provided by an incandescent/halogen light source and an energy saving type light (112) provided by a compact fluorescent light source. Both light sources are enclosed within a common envelope or an outer bulb (160). First and second thermal sensors (170A, 170B) are provided in the envelope (160) at spaced locations to monitor the temperature of the lamp. When the sum of these two temperatures reaches a preselected value, power to the instant light is terminated. Alternatively, when the difference of these two temperatures reaches a preselected value, power to the instant light is terminated.