LEDs are light sources give High Brightness with Low Power Consumption. LEDs generate Low Heat with Long life span and are Green to our environment.
Everyone needs light at places where or when there are dark. We try to provide the best lighting to brighten the places when we are in and hopefully Green or less damage to our environment.
Led lighting is the new generation lighting source and will be the only future light source. The natural characteristic of the Led lights make it more superior when compare to the traditional light sources. The advantages that Led light will bring to us are as follow…
* Led light need much less electrical power.
* Led generates very little heat when it is on operation.
* Led lightings have long life span??
* All the Led light internally is power by DC power it will not flicker
* The bandwidth of the Led light beam is narrow.
Recently (July 2011) I begin to realize that for certain types of Led Bulbs are not lasting.
* The Led bulb that is on for 24/7 (24 hours per day and 7 day per week) will have shorter working life span.
* The led bulbs that direct connected to 230Vac will fail faster than that of 12Vac bulbs.
* The smaller the size of the Led bulb (it should be the area of the Heat Sink of the Led chip.) of the same power will have shorter working life span.
After searching the information in the internet and consulted some friends in this line, the cause of the failure is not due to the Led Chip, the main problems come from the Led driver.
Led driver is the power supply that provides electrical condition (low voltage DC current) for the Led chip to generate light.
Led drivers are same as any Power supply which consist E-Caps (Electrolytic Capacitor) which is the weakest component (Shortest Life Span.) in the power supply circuit. Its Life Span will reduce when the working temperature increase.
Normally the life span of the E-cap is stated to 10 000 hours, but if the temperature of the environment around the E-Cap reduce by 10 degree Celsius, then life span of the E-cap can be double.
If the Led driver is working under the designed temperature, its design life span can be achieved. Although Led when in operation generates low heat while compare to traditional light sources, this heat if not handle carefully it will burn the Led chip.
In today technology, as long the temperature of the Led chip keep below 60 degree Celsius the Led chip will work fine. But the Led driver needs to work under designed temperature of which the highest limit is somewhere at 40 to 50 degree Celsius.
For the whole Led lamp, the temperature of the heat sink after in operation for half an hour should be at most 40 degree Celsius which is somewhere our hand can hold it.
Due to long Life Span of the Led chip, the real Life Span of the Led light is depended on the Led Driver which is same as power supply. All power supply is cold by air. This tells us that Led lamp needs to be placed at place that has good ventilation.
Electrolytic Capacitor Applcation Guide.
Type of Led lights
LED Spot Light Bulbs
They are designed to direct replace MR16 and GU10 Halogen Spot Bulbs.
Led bulbs--- For House and Office used
Power saving about 90% when replace Incandescent Bulbs.
Power saving about 50% when replace Energy Saving Bulbs
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Led Flood Lamps.
LED DOWN LIGHTS
Led Sensor Light
Solar Underground Lamp.
Solar spot Lights.
Led MR16 spot Bulbs.
Led Ceiling lights.
Led flood Lights