LED lighting lamps and lanterns of efficacy

Conventional LED street light of the chip, not stem weakness, developed a crystal coated chip mounting method. The surface of the two electrode over the bottom and the direct use of silver soldered to the metal heat conducting substrate. So heat transfer by conduction silver adhesive than previous solid crystal directly.

Recently, South Korea, Taiwan large power LED chip also has to add a layer of metal coating on a sapphire substrate method, it can also be used to replace the silver paste silver paste to the solid crystal. Silver paste after curing, thermal conductivity near sterling silver, silver plastic thermal rate to be high.

Rare earth fluorescent powder is continuously improved, so that the overall lighting industrial benefit - metal halide lamp, high pressure sodium lamp, fluorescent tube energy-saving lamp and the new large power LED spotlight

LED chip if not directly to COB solid crystal on the circuit substrate, will find a fast heat conduction material as with the radiating fins into an intermediate medium. Copper is a metal heat conducting only slightly inferior to the silver material, low price, so the copper is the most common large power LED tube light chip heat transfer material.