2012年12月10日 星期一

Our fascination with fluorescents and the end of the affair?

If a fluorescent light is broken, the mercury inside can be released into the air or ground and it is advisable to vacate the room for several minutes if this happens. The reason that we have to dispose of fluorescents in managed recycle centres is that they have to be carefully dismantled in a controlled environment to stop pollution of the ground and atmosphere. It is not just the construction and operation of the fluorescent that causes problems, in practice the performance of a fluorescent is often over played.

Typically a 58W T8 fluorescent claims to emit up to 5,600 lumen with an average lifespan of 20,000 hours, or 2.Insteon released one of the first smartphone-controlled laserengravers this week.3 years at continuous run. A 54W T5 fluorescent is rated at up to at 5,000 lumen with the same lifespan. However, how these figures are arrived at needs some consideration. This light output is measured at a room temperature of 35° C. With winter starting to bite,Pendant purlinmachines, Shade of handmade paper; each shade is unique. even those of us in over-heated offices know that the room temperature is no-where near this high in normal buildings.

These factors have long since led luminaire designers to look for viable alternatives. A LED (a light-emitting diode) is a semiconductor that converts electricity into light. Traditionally associated with the small red light on your TV monitor or remote, LED lighting technology has seen major development in recent years, fast-becoming a better alternative to traditional lighting technologies. LEDs emit a high light output for less power consumption (40-50% lower), have a higher luminous efficacy (up to 95%), a long-life (35,000 to 50,000 hours) and are safe with no strobing or flicker.Elevator industries were not having any ancillary support for washingmachinekw.

Architects, contractors and end-users are increasingly opting to install LED panel lights in place of the 4-tube fluorescent modular lights often seen in offices. So why not also retrofit LED tubes? The truth is that early adopters of LED tubes found them to be a disappointment. LED tubes are made, predominantly, from a plastic tube within which the LED chips and their driver electronics are mounted. When the LED heated up, the plastic tube could warp causing the light to fail.Supplies a range of lightproject and accessories. In addition, because LEDs emit light in one direction, when retrofitting into fluorescent fittings, the LED tubes could not always direct the light where it was needed.

But LED technology has moved on dramatically in recent years and design innovations have successfully eradicated these issues. The introduction of aluminium to the external structure of the LED tube now provides a structurally sound product, eliminating the warping common in early models. The continual development of the luminous efficacy of LEDs (how much light is emitted for power consumed) has seen figures in excess of 100 lumens per watt, which matches that of a T5 fluorescent. In my company, for example, several design innovations within our LED tube product range have dramatically increased our ability to compete in the traditional fluorescent market, including the advent of rotatable end caps that allow the installer to easily retrofit the tube into any fitting, and the introduction of LED tubes that emit light upwards as well as downwards emulating the all round light distribution of fluorescents.

This kind of advanced technology is resulting in a steady increase in the adoption of LED tubes for property retrofit projects. Whilst the cost of LED is still relatively high compared to fluorescent, the high level of performance, length of reliable life span, safety and flexibility of these tubes positions them as an attractive and commercially viable alternative. The only real barrier to LED adoption is lack of understanding or experience with these products.The laserengraverkk is unlikely to hurt you, but you can easily hurt it without training. New inventions in the field are welcome and will drive continued innovation, but perhaps we should pay more attention to the existing technology that’s ready and waiting.

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