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Led light Special products made for Swimming pool
Solid State Lighting
Solid State Lighting continues to become more prevalent. Solid state lighting differs from conventional lights (like fluorescent and light-bulbs) because they are do not have gases or filaments that are stimulated to produce light. FREQUENTLY ASKED QUESTIONS 1. What is solid-state lighting? Solid-state lighting is a new technology that has the potential to far exceed the energy efficiencies of incandescent and fluorescent lighting. Solid-state lighting uses light-emitting diodes or "LEDs" for illumination -- the same kind of practical and inexpensive devices that provide the letters on your clock radio. The term "solid-state" refers to the fact that the light in an LED is emitted from a solid object—a block of semiconductor—rather than from a vacuum or gas tube, as in the case of incandescent and fluorescent lighting. There are two types of solid-state light emitters: inorganic light-emitting diodes (usually abbreviated LEDs) or organic light-emitting diodes (usually abbreviated OLEDs). 2. How does solid-state lighting differ from conventional lighting? Incandescent lamps (light bulbs) create light by heating a thin filament to a very high temperature. Incandescent lamps have low efficiencies because most (over 90%) of the energy is emitted as invisible infrared light (or heat). A fluorescent lamp produces ultraviolet light when electricity is passed through a mercury vapor, causing the phosphor coating inside the fluorescent tube to glow or fluoresce. There are efficiency losses in generating the ultraviolet light, and in converting the ultraviolet light into visible light. Incandescent lamps typically have short lifetimes (around 1,000 hours) due to the high temperatures of the filaments, while fluorescent lamps have moderate lifetimes (around 10,000 hours) that are limited by the electrodes for the discharge. LEDs, on the other hand, use semiconductors that are more efficient, more rugged, more durable, and can be controlled (for example, dimmed) more easily. Small LEDs have lifetimes up to 100,000 hours 3. What is the energy efficiency of solid-state lighting today? How does the energy efficiency compare with incandescent and fluorescent lamps? Light output is commonly measured in lumens — a convolution of the radiated power and the sensitivity of the human eye. A 60-Watt incandescent bulb produces about 850 lumens. The efficiency of lighting (luminous efficacy) is the light output (lumens) produced per unit of input electrical power (Watts) – or lumens/Watt. An incandescent lamp wastes most of its power as heat, with the result that its luminous efficacy is only around 15 lumens/Watt. A fluorescent lamp is much better at roughly 85 lumens/Watt. These lighting technologies are very mature and their luminous efficacies have not improved much in many years. Today’s white LEDs, at around 30 lumens/Watt, have luminous efficacies that are already better than those of incandescent lamps. Moreover, it is believed possible to increase the luminous efficacies of LEDs to as high as 150-200 lumens/Watt (over 10X and 2X better than incandescent and fluorescent lamps, respectively!), with further improvements in the underlying materials and device properties and design.
The life ownership cost of lighting is the cost of lighting over the lifetime of the light source, including both the purchase and operating costs of lighting. Current white LEDs have life ownership costs roughly 2x higher than incandescent lamps, and roughly 10x higher than fluorescent lamps. Part of the promise of solid-state lighting is its potentially longer lifetimes and greater efficiencies, which could ultimately lead to life ownership costs that are 1/10 and 1/2 those of incandescent and fluorescent lighting, respectively. 5. What is the quality of the white light using solid-state lighting today? How does it compare with incandescent and fluorescent lamps? The quality of a lighting source is judged by its ability to reproduce the appearance of an object as if illuminated by "true" white light. The color-rendering index (CRI) is an imperfect, but widely used quantitative measure of the ability of the lighting source to accurately render the color of objects. Natural sunlight and incandescent lamps have CRIs of 100 while fluorescent lamps have CRIs between 70 and 85. The type and quality of lighting required depends on the application. Current white LEDs have CRIs around 70, suitable for flashlights and outdoor lights; future white LEDs will likely have values above 80, suitable for use in commercial spaces, offices, and homes. 6. How much energy can be saved with solid-state lighting? How much will these energy savings reduce CO2 emissions? A little over one-third of all primary energy is used for generation of electricity, and a little over one-fifth of all electricity is used for lighting. Hence, around one-fifteenth of all energy is used for lighting in the United States. Doubling the average luminous efficacy of white lighting through the use of solid-state lighting would potentially: · Decrease by 50% the global amount of electricity used for lighting. · Decrease by 10% the total global consumption of electricity (projected to be about 1.8 TW-hr/year, or $120B/year, by the year 2025). · Free over 250 GW of electric generating capacity for other uses, saving about $100B in construction costs. · Reduce projected 2025 global carbon emissions by about 300 Mtons/year. 7. What about the benefits of white LED lighting for the developing countries? There are approximately 2 billion people without access to electricity. These people use traditional fuels (e.g., kerosene or bio-mass) that degrade their environment and cost over 1500 times more per lumen-hour than the conventional lighting using electricity in developed countries. Solid-state lighting can be highly beneficial to developing countries by providing efficient lighting technology that can be implemented in small increments and that works well with small, micro-power systems (e.g., solar photovoltaic, small hydroelectric generators, etc.). 8. Where can I see LED lighting today? The first LEDs were not very bright, and were used primarily as indicator lights on electronic devices. Today’s high-brightness LEDs can be found in a wide number of consumer applications. These include backlighting for color displays in personal electronics (e.g., cell phones), automotive interior and exterior lighting, traffic signals, large-area outdoor displays (such as those in New York’s Time Square, or along the Las Vegas strip), channel lettering (replacements for neon-tube signage, architectural accent lighting, etc.). LEDs emitting in the ultraviolet (UV) wavelengths are finding use in a wide range of environmental applications (e.g., water purification and biochemical detection), as well as in medical devices. |
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simply
change your ordinary light bulb with any of
the two models Sealed Beam LED Hi-Tec. In 10
minutes you can change the look of your pool
to an amazing rainbow of colors. Smart Aqua
Light LED bulbs are standard PAR56,
waterproof with 108 to 252 independent
LED units inside. Also Smart Aqua Light LED
bulbs are pre-programmed up to 16
independent effects.
FEATURES:
LED
bulbs are pre-progammed with an assortment
of lighting effects. When you turn the LED
light - off - and then - on - again within
1-2 seconds, it advances to the next effect.
Effects can be controlled by either using
the pool's pre-existing light switch, or by
installing an simply Wireless Remote Control
Unit.