Energy Efficiency with Lighting

Part 6 of Energy-Efficient Lighting. Lighting represents 20% to 25% of the electricity consumed in the USA. An average family spends 5% to 10% of its energy for lighting budget, while businesses consume 20% to 30% of their total energy for lighting only. In a residential or commercial lighting installations, 50% or more waste of […]

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Color of Light and Color Rendering

Part 5 of Energy-Efficient Lighting. Cool light is preferred for visual tasks because it produces higher contrast than warm light. Contrast is the brightness difference between different parts of the visual field, which is the area of space you can see at a given instant without moving your eyes. Warm light is preferred for living […]

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How to: Fluorescent Lamp Disposal

Part 4 of Energy-Efficient Lighting. All fluorescent lamps contain small amounts of mercury, and some compact fluorescent lamps with magnetic ballasts contain small amounts of short-lived radioactive materials. Because of these hazardous materials, you should not throw burned out bulbs in the trash. Discover if there is a recycling program for them in your communities, […]

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Types of Lighting

Part 3 of Energy-Efficient Lighting. There are four basic types of lighting:¬†incandescent, fluorescent, high-intensity discharge,and¬†low-pressure sodium. Incandescent lighting is the most common type of lighting used in residences. Fluorescent lighting is used primarily in commercial indoor lighting systems, while high-intensity discharge lighting is used only for outdoor lighting applications. Low-pressure sodium lighting is used where […]

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Lighting Principles and Terms

Part 2 of Energy-Efficient Lighting. In choosing the best lighting options, you must understand what basic lighting is. This page explains the terminology used in the industry, which will help you better understand the language that you might hear in a lighting store. Illumination A lumenis a measurement of the light of a lamp, often […]

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Energy-Efficient Lighting

Part 1 of Energy-Efficient Lighting. The quantity and quality of light around us determine how well we see, work, and play. Light affects our health, safety, morale, comfort, and productivity. Lighting also directly affects our economy. As a nation, we spend about one-quarter of our electricity budget on lighting, or more than $37 billion annually. […]

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