Led Lighting For Energy Efficiency Ppt Download

But this is only the efficiency of the light emitting diode.

Led lighting for energy efficiency ppt download.

Led is a highly energy efficient lighting technology and has the potential to fundamentally change the future of lighting in the united states. When designed well led lighting is more efficient versatile and lasts longer. These also have an efficiency so that the overall efficiency is lower again. Advantages energy savings typically a led based light bulb uses 10 of traditional and only 50 of energy saving lighting technologies.

Led light bulbs are 10 60 times more energy efficient than incandescent light bulbs. A very important metric of an led is the external quantum efficiency ηext. The energy e of the light emitted by an led is related to the electric charge q of an electron and the voltage v required to light the led by the expression. E qv joules.

Led light bulbs withstand great amount of vibration shock and temperature variations. That means leds are able to use light and energy more efficiently in a multitude of applications. However it also means that sophisticated engineering is needed to produce an led light bulb that shines light in every direction. Benchmarks for the efficacy of led packages and complete luminaires as well as providing comparisons to conventional technologies.

Robustness no moving parts no glass no filaments. Power consumption of led light bulb is only 10 of the standard light bulb. 7 most modern led operate in a range of 2 to 4 volts and consume anywhere between 350ma and 1500ma. The remaining energy used is radiated as heat.

Size typical package is only 5 mm in diameter. Current led lamps have an efficiency of about 30 to 40. Residential leds especially energy star rated products use at least 75 less energy and last 25 times longer than incandescent lighting. Led light bulbs typically need to be changed only every 10 12 years.

It is also defined as the. It is defined as the light output divided by the electrical input power. An led lamp also contains an led driver and optical components. It quantifies the efficeincy of the conversion of electrical energy into emitted optical energy.

Energy efficiency 50 90 less energy used translates into smaller power supply. Introduction the energy efficiency of led products is typically characterized using efficacy which in basic terms is the ratio of power input to light output or more technically emitted flux lumens divided. Changing light bulbs in a large building create considerable maintenance cost.