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1 - Save 80% to 90% on energy costs when substituting LEDs for incandescent / halogen bulbs.
2 - For every 20 incandescent / halogen bulbs you replace, you will replace only 1 LED bulb.
4 - LED bulbs illuminate at full output instantly when turned on.
5 - LED performance and life expectancy is not affected by frequent or even rapid on-off cycling.
6 - LEDs are more resistant than incandescent / halogen bulbs to mechanical failure due to shock and vibration.
7 - LED performance is unaffected and even improves in cold temperatures.
8 - LED light bulbs produce minimal ultraviolet and infrared radiation.
9 - LED bulbs contain no mercury.

 

 

 

LED bulbs come in different variations of white. typical incandescent bulb colour temperature is 2800K. A typical halogen is a bit higher, roughly 3000K. Daylight white is 4500K and a cool white fluorescent is 6000K or more. Warm white is primarily used in personal, friendly, or intimate settings. White and Cool White are commonly used in offices, jewellery stores, galleries and museums.

The human eye adapts to background light so that even a daylight white bulb will look slightly blue in a room illuminated mainly with incandescent bulbs. Similarly, an incandescent bulb will look very yellow in a midday sunlight. 

 

 

 

The beam angle is the angle across the cone of light from one beam edge to the opposite beam edge. The beam edge is the cone shaped surface where the beam intensity is 50% of what it is at the center of the beam. (50% is somewhat arbitrary, but seems to be the most commonly used figure).

A flood light has a beam spread of around 22 degrees or more. A spot has a beam spread of less than 21 degrees. (21° is also arbitrary, but commonly used as the dividing point between floods and spots). If you compare a flood and spot with the same light elements (and lumen output), the flood has a lower “brightness,”  because the bulb is spreading the light over a larger cone. That may not seem entirely fair to the flood light, but research has linked human perception of “brightness” with luminance.

LED spotlights output a narrower beam of light. Most of the light from a spotlight is concentrated onto a relatively small area producing a bright spot.

Led floodlights output a wider beam of light, up to 160 degrees, so the light from a floodlight is spread out over a much larger area. Because the light is more concentrated, a spotlight will appear brighter than a floodlight but only within its narrower beam. A spotlight is more suited to illuminating objects and a floodlight is more suited to illuminating areas.


One of the most important things is the brightness of the bulb. You have to make sure that the LED bulb will provide enough light for your needs.  The measure of brightness is luminous flux, measured in lumens.

LEDs do not use a filament where a conductor is heated and light is created. Filament based lighting consumes more power than the light produced. LEDs produce very little amounts of heat and do not use filaments making them far more efficient in consumption and output. LED light bulbs are much brighter than incandescent or halogen bulbs of the same wattage. Thus you are using 80% less electricity.

Incandescent bulbs use about eight times as much power to produce the same amount of light as LED bulbs. At low power levels the difference is larger. At higher power the difference is somewhat smaller. Electrical power is measured in watts. For example, a LED bulb consuming 3 watts might output light comparable to a 20watt incandescent or 25watt halogen bulb, and a 6watt LED bulb might be comparable to a 45watt incandescent or 50watt halogen bulb. 
 

 





Example:
Your room has 8 pot lights with halogen 50watt bulbs, which equals to 400watts. In 1 year, with 8 hours of use every day, you use 1168Kmh. Each Kwh cost $0.1 therefore you pay $116.8 each year for the room. However, using eight 6watt LED bulbs instead of the eight halogen bulbs will only consume 48watts. In 1 year, using LED bulbs for 8 hours every day, you use 140Kwh. Each Kwh cost $0.1 therefore with LED bulbs you pay $14 each year.

Conclusion:
By replacing halogen bulbs to LED you can save $102.08 on your electricity bill.







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