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Submitted By phylophase
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I. Introduction
Common household lighting has evolved from oil and gas lamps in the 17th and 18th centuries to electric lamps in the late 19th century. Electric lamps have since progressed from incandescent to fluorescent to mercury vapor (MV). Today high intensity discharge (HID) lamps dominate street lighting installations. Two HID lamp types predominate: high pressure sodium (HPS), noted for its yellow/orange light, and metal halide (MH) that emits a bright light. Recently the trend has been to convert to LED fixtures because of documented savings on energy use and life-cycle maintenance costs. In our technology today, one of the most useful devices to be invented is the “Night Detector Lights”. This device is off used in special facilities and even in common households. This device give luminance in the sight of darkness, it is after all a night detector.

A. Background
“Night Detector Lights” are extremely useful and versatile in a wide range of renewable energy projects from automatic lighting to security systems. This circuit uses a light dependent resistor to detect luminance in the surroundings to prevent the circuit from giving power to the LED/Bulb for it to illuminate. The light dependent resistor (LDR) converts the light it absorbs into heat that then signals the resistor when gathered enough heat to cut off the flow of electricity to its destination the LED/Bulb. This may sound complex but it is rather simple. The LDR represents the switch of the circuit as it is automatically switched on/off by the light it absorbs.

B. General Statement of the Problem Determining the required luminance to prevent the circuit from giving power to the bulb Proper setup of the circuit to prevent short-circuiting C. Statement of the Objectives
D. Statement of Significance
E. Scope and Limitation
II. Review of Related Literature
III. Research

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