However, the performance of screw-in lamps is usually not as good as the separate lamp and ballast combination. Self-ballasted, "screw-in" retrofit CFL lamps are sometimes used in the energy saving retrofit market. Care must be taken to minimize direct views of extremely bright small-diameter lamps such as T5 and T5HO.Ĭompact fluorescent lamps (CFL) are often used as simple substitutes for incandescent lamps due to their significantly longer life and better energy efficiency. Indirect/direct linear fluorescent pendants and wall-mounted uplights are typical applications for these sources. The long and diffuse nature of these lamps provides excellent surface lighting, and the smaller lamp diameters make for better optical performance in many luminaires. These new lamps work well in luminaires that provide the general ambient lighting for a space. These smaller diameter lamps have replaced the T12 lamps that have dominated the market for the past 30 years.
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Linear fluorescent lamps T5HO lamps are now used in many high bay applications in place of H.I.D.
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#LITHONIA LIGHTING VISUAL LAYOUT TOOL INSTALL#
To gain the most efficiency, use current and proven equipment technology and install fluorescent luminaires in places where they can be integrated with the architecture, available daylight, and switching or dimming controls. Energy Efficient Lamps Commonly Used TodayĮnergy efficient, fluorescent lamps Fluorescent Lampsįluorescent Lamps are about 3 to 5 times as efficient as standard incandescent lamps and can last about 10 to 20 times longer. This includes distribution characteristics, efficiency, quality of construction, aesthetics, and economics. Luminaires are selected for their lighting effectiveness. Electronic ballasts are also responsible for better lamp performance, extending life and improving color characteristics. Frequencies in the 20 kHz range and higher provide smooth, non-flickering lamp operation. High frequency electronic ballasts are also important to visual performance because they reduce eyestrain and fatigue. For example, many T8 and T5 linear fluorescent and compact fluorescent lamps are excellent choices for today's buildings because they are energy efficient, have great color rendering properties, long life, and are readily available, easily controllable and very affordable. Lamp selection is based on efficacy (lumens per watt), color temperature, color rendering index, life and lumen maintenance, availability, switching, dimming capability, and cost.
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Lighting equipment selection should be based on a balance between the requirements of the design and an effort to limit the number of fixture types and lamp types in order to have reasonable maintenance inventories. To achieve a quality lighting environment, carefully choose the equipment to satisfy both performance and aesthetics needs. Recently developed energy efficient lighting equipment such as compact fluorescent lamps and "soft-start" electronic ballasts can be used to help cut lighting operational costs 30% to 60% while enhancing lighting quality, reducing environmental impacts, and promoting health and work productivity. Specifying a high quality energy efficient lighting system that utilizes both natural and electric sources as well as lighting controls can provide a comfortable yet visually interesting environment for the occupants of a space. In commercial buildings it normally accounts for more than 30% of the total electrical energy consumed. In the United States about one-quarter of the electricity budget is spent on lighting, or more than $37 billion annually. Besides affecting the physical and emotional well-being of the building occupants, a building's interior lighting system is both a dominant consumer of electrical energy and a major source of internal heat.