LED lighting bulbs look similar but there is a difference and if you are thinking of shifting to LED lighting it is worth looking at this. You will hear tales of clever people purchasing their LED lights from dependable sources for very affordable prices and will speculate why they cost so much from local sellers.
The number of buyers of LED chips is limited so anybody selling crap at high prices would soon run short of consumers. So it is a practical assumption that the higher the cost the better the quality. It is worth remembering that the lower end products are produced for the local market in China and are not meant to be exported.
High pressure sodium lights are generally belonging to the high intensity discharge or HID family of fluorescent lamps and lights. These products can offer optimal lighting while using nominal electrical power consumption if efficiently operated within optimum condition.
Probably the most critical part of the LED lighting lamp is the driver. The driver has the task of transforming the 230 Volt Alternating Current into Direct Current passing at a fixed number of Amps through the chip.
The Alternating Current reverses direction 50 times per second so the first job for the driver is to alter one cycle so that there are two pulses of current flowing in the one direction. The difficult job is to smooth these pulses into a steady electricity flow and this is where there is a big difference in the quality of the drivers.
The finest will have about a 3% ripple in the power every cycle while the cheap devices may have a ripple of up to 45%. The percentage is of the value of the maximum electricity.
The ripple will cause the light to flicker but as it does so at 100 cycles per second it is not detectable to the naked eye. Nevertheless the effect can be felt and people may suffer headaches, eye strain, or migraines. This basically was the issue with the old style fluorescent lamps.
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If the driver is providing say 700 milliAmps to the LED, the ripple while it passes will supply a higher and lower flow with the average being 700 mA. The higher current generates more heat that is not completely dissipated during the lower electricity supply. The heat builds up and stabilises at a higher temperature, how much higher depends on the percentage of the ripple. This will reduce the life of the LED - significantly with the larger ripples.
Climatic change is among the most biggest talked about subjects in the headlines. Everyone is inventing ways to make energy that will not run out; while at the exact same time will not create any ravage. The environment banks on these kinds of inventions, like a factor to surviving.
Perhaps 90% of the failures of LED lights are attributed to the driver.
The other areas where cost savings are done is by scrimping on the heat sink, wiring and connectors.
Frequently by looking at the finish and wiring it is clear, but not always. A foolproof way is to use your mobile camera to look at the light operating. Any flicker will show up although it is not visible.
Wind power generators supply cheap power, and are also very cheap energy producers. However, one must remain cautious of the variation in amount of electricity they can generate. There are also several regulations that may deter someone trying to procure and install wind generators.
Before you purchase a LED downlight bulb look at it working through your phone camera. If it flickers profoundly or bands move across the screen do not buy it although it is half the price of the competition.
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