where to buy led christmas lights, new LED Lights

Recently, the mainstream 0.5W and 1W LED Lights of price drops faster than the 5-10% decline in fourth quarter of 2011 and 2011 full-year decline of nearly 40% to 50%. It’s expected that in 2012 this rate will slow down, it is estimated that the 2012 full year it prices will fall 20-30%. where to buy led christmas lights?

To furtherly reduce the cost of the LED Street Light, some vendors try to use the cheaper silicon and metal materials as the substrate material to develop high-power LED, but this practice in the early 2011′s when a good subject, but last year the third and fourth quarter, as demand for LED production capacity and the sapphire substrate manufacturing capacity expansion, the end of last year the price of sapphire compared with the beginning of last year has been reduced by more than half. For example, the beginning of last year’s Sapphire’s price is more than 30 dollars, but by the end of last year, the lowest offer only about $ 7. When the sapphire prices fell to below $ 10, the substrate with other materials is not obvious advantages. where to buy led christmas lights?

Silicon substrate technology is actually developed quite early, but has not been developed, mainly because there are several important issues: First, the silicon defects, its luminous efficiency is relatively poor. The epitaxial growth of silicon, silicon itself will absorb light and therefore must silicon removed, do light carrier of other substrates (whether metal or other substrate). Here have to do the conversion of a substrate, the process itself is not so easy. When you increase a process when the silicon substrate to be replaced by another substrate, basically use the benefits of silicon. where to buy led christmas lights?

LED Products costs with silicon carbide substrate cost is much higher than the sapphire substrate, luminous efficiency of the silicon carbide substrate and the epitaxial growth of quality is better. The sub-opaque and opaque two types of silicon carbide materials, such as opaque silicon carbide substrate cost, rather than the transmittance of silicon carbide with silicon material, must be done after the epitaxial substrate conversion , the substrate conversion process will be related to another process, yields that there are some problems. So we mainly sapphire based materials, the technology has developed quite long and very mature.